Prosecution Insights
Last updated: May 29, 2026
Application No. 18/974,167

COOLING ARRANGEMENT AND METHOD FOR COOLING AN AT LEAST TWO-STAGE COMPRESSED AIR GENERATOR

Non-Final OA §102§103
Filed
Dec 09, 2024
Priority
Jan 30, 2019 — DE 102019102387.4 +3 more
Examiner
EDWARDS, LOREN C
Art Unit
3746
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Gardner Denver Deutschland GmbH
OA Round
2 (Non-Final)
82%
Grant Probability
Favorable
2-3
OA Rounds
1y 0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allowance Rate
540 granted / 661 resolved
+11.7% vs TC avg
Strong +28% interview lift
Without
With
+28.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
30 currently pending
Career history
693
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
75.2%
+35.2% vs TC avg
§102
16.2%
-23.8% vs TC avg
§112
4.9%
-35.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 661 resolved cases

Office Action

§102 §103
Notice of Pre-AIA or AIA Status The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . DETAILED ACTION In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. Response to Amendment The Amendment filed 12/15/25 has been entered. Claims 1-10 have been canceled. Claims 11, 20, 23, 25, and 29 have been amended. Claims 11-30 remain pending in the application. Applicant’s amendments to the Claims have overcome every objection previously set forth in the Non-Final Office Action mailed 9/16/25. Response to Arguments Applicant’s arguments with respect to claims 11, 20, and 29 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. Claim Objections Claim 11 is objected to because of the following informalities: “the coolant outlet” in line 6 should be --the coolant outlet of the liquid-cooled aftercooler--; “the coolant inlet” in line 7 should be --the coolant inlet of the liquid cooled aftercooler--. Claim 20 is objected to because of the following informalities: “the coolant outlet” in line 6 should be --the coolant outlet of the liquid-cooled aftercooler--; “the coolant inlet” in line 7 should be --the coolant inlet of the liquid cooled aftercooler--. Claim 29 is objected to because of the following informalities: “the coolant outlet” in line 6 should be --the coolant outlet of the liquid-cooled aftercooler--; “the coolant inlet” in line 7 should be --the coolant inlet of the liquid cooled aftercooler--. Appropriate correction is required. Claim Rejections - 35 USC § 102 The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claims 11-12, 17, 20-21, and 29 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Meeusen et al. (U.S. 2018/0258952). PNG media_image1.png 870 632 media_image1.png Greyscale Re claim 11: Meeusen discloses an at least two-stage compressed air generator (30, two stage compressor - Para 92)(see Fig. 4), comprising: a liquid-cooled intercooler (Modified Fig. 4 above - A (person having ordinary skill in the art would recognize element A as a type of liquid-cooled intercooler; element A corresponds to an element 10 which is a “gas cooler” per Para 61 and which carries coolant as shown at C1 and as described in Para 62 which is liquid per Para 3)) for cooling precompressed air (Para 62 - “compressed gas originating from the compressor element 2…” (not described as air but structure of element 2 shown/described inherently capable of compressing air which is a type of gas)) discharged from a first compressor stage (Modified Fig. 4 above - B (person having ordinary skill in the art would recognize element B as a type of first compressor stage; element B corresponds to an element 2 which is a compressor element per Para 61)), the liquid-cooled intercooler (Modified Fig. 4 above - A) including a coolant inlet (Modified Fig. 4 above - C (person having ordinary skill in the art would recognize element C as a type of coolant inlet)) and a coolant outlet (Modified Fig. 4 above - D (person having ordinary skill in the art would recognize element D as a type of coolant outlet)), the coolant outlet (Modified Fig. 4 above - D) directly coupled to the coolant inlet (Modified Fig. 4 above - C) within the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above); a liquid-cooled aftercooler (Modified Fig. 4 above - E (person having ordinary skill in the art would recognize element E as a type of liquid-cooled intercooler; element E corresponds to an element 10 which is a “gas cooler” per Para 61 and which carries coolant as shown at C1 and as described in Para 62 which is liquid per Para 3)) for cooling air compressed by a second compressor stage (Modified Fig. 4 above - F (person having ordinary skill in the art would recognize element F as a type of second compressor stage; element F corresponds to an element 2 which is a compressor element per Para 61))(see Modified Fig. 4 above and Para 99), the liquid-cooled aftercooler (Modified Fig. 4 above - E) including a coolant inlet (Modified Fig. 4 above - G (person having ordinary skill in the art would recognize element G as a type of coolant inlet)) and a coolant outlet (Modified Fig. 4 above - H (person having ordinary skill in the art would recognize element H as a type of coolant outlet)), the coolant outlet (Modified Fig. 4 above - G) directly coupled to the coolant inlet (Modified Fig. 4 above - H) within the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above); a liquid-cooled subassembly cooler (Modified Fig. 4 above - I (person having ordinary skill in the art would recognize element I as a type of liquid-cooled subassembly cooler; element I corresponds to an element 21 which is a motor cooler per Para 69 which is liquid cooled as shown and per Para 73)) for absorbing heat from the compressed air generator (30)(see Fig. 4 and Para 73); wherein at least one of the liquid-cooled intercooler (Modified Fig. 4 above - A) or the liquid-cooled aftercooler (Modified Fig. 4 above - E) have a plurality of feed inlets (Modified Fig. 4 above - C and element 25 (see Fig. 4 and Para 72)), to which a coolant can be fed from a coolant outlet (Modified Fig. 4 above - J (person having ordinary skill in the art would recognize element J as a type of coolant outlet of element I)) of the subassembly cooler (Modified Fig. 4 above - I)(see Modified Fig. 4 above and Paras 72-73); and wherein the coolant outlet of the subassembly cooler (Modified Fig. 4 above - J) is connected to a feed inlet (25, intermediary point - Para 72) of the liquid-cooled intercooler (Modified Fig. 4 above - A) and a feed inlet (25, intermediary point - Para 72) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above), and wherein the feed inlet (25) of the liquid-cooled intercooler (Modified Fig. 4 above - A) is directly disposed between the coolant inlet (Modified Fig. 4 above - C) of the liquid-cooled intercooler (Modified Fig. 4 above - A) and the coolant outlet (Modified Fig. 4 above - D) of the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above), and wherein the feed inlet (25) of the liquid-cooled aftercooler (Modified Fig. 4 above - E) is directly disposed between the coolant inlet (Modified Fig. 4 above - G) of the liquid-cooled aftercooler (Modified Fig. 4 above - E) and the coolant outlet (Modified Fig. 4 above - H) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above). Re claim 12: Meeusen discloses the compressed air generator (30) according to Claim 11 (as described above), wherein the feed inlet (25) of the liquid-cooled intercooler (Modified Fig. 4 above - A) is disposed at a point (see Modified Fig. 4 above at element 25 of element A) at which an intermediate temperature of a coolant in the liquid-cooled intercooler (Modified Fig. 4 above - A) is within twenty percent (±20%) of an exit temperature of the coolant at the subassembly cooler (Modified Fig. 4 above - I)(see Modified Fig. 4 above (structure is depicted such that element 25 of element A is shown at a point at which an intermediate temperature of a coolant in element A is capable of being within twenty percent (±20%) of an exit temperature of the coolant at element J). Re claim 17: Meeusen discloses the compressed air generator (30) according to Claim 11 (as described above), wherein a distributor unit (Modified Fig. 4 above - M (person having ordinary skill in the art would recognize element M as a type of distributor unit)) is disposed between the coolant outlet (Modified Fig. 4 above - J) of the subassembly cooler (Modified Fig. 4 above - I) and the feed inlets of the plurality of feed inlets (Modified Fig. 4 above - C and element 25)(see Modified Fig. 4 above), wherein the distributor unit (Modified Fig. 4 above - M) selectively supplies the plurality of feed inlets (see Modified Fig. 4 above at element 39 and paras 95-96). Re claim 20: Meeusen discloses an at least two-stage compressed air generator (30, two stage compressor - Para 92)(see Fig. 4), comprising: a liquid-cooled intercooler (Modified Fig. 4 above - A (person having ordinary skill in the art would recognize element A as a type of liquid-cooled intercooler; element A corresponds to an element 10 which is a “gas cooler” per Para 61 and which carries coolant as shown at C1 and as described in Para 62 which is liquid per Para 3)) for cooling precompressed air (Para 62 - “compressed gas originating from the compressor element 2…” (not described as air but structure of element 2 shown/described inherently capable of compressing air which is a type of gas)) discharged from a first compressor stage (Modified Fig. 4 above - B (person having ordinary skill in the art would recognize element B as a type of first compressor stage; element B corresponds to an element 2 which is a compressor element per Para 61)), the liquid-cooled intercooler (Modified Fig. 4 above - A) including a coolant inlet (Modified Fig. 4 above - C (person having ordinary skill in the art would recognize element C as a type of coolant inlet)) and a coolant outlet (Modified Fig. 4 above - D (person having ordinary skill in the art would recognize element D as a type of coolant outlet)), the coolant outlet (Modified Fig. 4 above - D) directly coupled to the coolant inlet (Modified Fig. 4 above - C) within the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above); a liquid-cooled aftercooler (Modified Fig. 4 above - E (person having ordinary skill in the art would recognize element E as a type of liquid-cooled intercooler; element E corresponds to an element 10 which is a “gas cooler” per Para 61 and which carries coolant as shown at C1 and as described in Para 62 which is liquid per Para 3)) for cooling air compressed by a second compressor stage (Modified Fig. 4 above - F (person having ordinary skill in the art would recognize element F as a type of second compressor stage; element F corresponds to an element 2 which is a compressor element per Para 61))(see Modified Fig. 4 above and Para 99), the liquid-cooled aftercooler (Modified Fig. 4 above - E) including a coolant inlet (Modified Fig. 4 above - G (person having ordinary skill in the art would recognize element G as a type of coolant inlet)) and a coolant outlet (Modified Fig. 4 above - H (person having ordinary skill in the art would recognize element H as a type of coolant outlet)), the coolant outlet (Modified Fig. 4 above - G) directly coupled to the coolant inlet (Modified Fig. 4 above - H) within the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above); a liquid-cooled subassembly cooler (Modified Fig. 4 above - I (person having ordinary skill in the art would recognize element I as a type of liquid-cooled subassembly cooler; element I corresponds to an element 21 which is a motor cooler per Para 69 which is liquid cooled as shown and per Para 73)) for absorbing heat from the compressed air generator (30)(see Fig. 4 and Para 73); wherein at least one of the liquid-cooled intercooler (Modified Fig. 4 above - A) or the liquid-cooled aftercooler (Modified Fig. 4 above - E) have a plurality of feed inlets (Modified Fig. 4 above - C and element 25 (see Fig. 4 and Para 72)), to which a coolant is fed from a coolant outlet (Modified Fig. 4 above - J (person having ordinary skill in the art would recognize element J as a type of coolant outlet of element I)) of the subassembly cooler (Modified Fig. 4 above - I)(see Modified Fig. 4 above and Paras 72-73), and wherein the coolant outlet of the subassembly cooler (Modified Fig. 4 above - J) is connected to at least one of a feed inlet (25, intermediary point - Para 72) of the liquid-cooled intercooler (Modified Fig. 4 above - A) and a feed inlet (25, intermediary point - Para 72) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above), and wherein the feed inlet (25) of the liquid-cooled intercooler (Modified Fig. 4 above - A) is disposed between the coolant inlet (Modified Fig. 4 above - C) of the liquid-cooled intercooler (Modified Fig. 4 above - A) and the coolant outlet (Modified Fig. 4 above - D) of the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above), and wherein the feed inlet (25) of the liquid-cooled aftercooler (Modified Fig. 4 above - E) is disposed between the coolant inlet (Modified Fig. 4 above - G) of the liquid-cooled aftercooler (Modified Fig. 4 above - E) and the coolant outlet (Modified Fig. 4 above - H) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above). Re claim 21: Meeusen discloses the compressed air generator (30) according to Claim 20 (as described above), wherein the feed inlet (25) of the liquid-cooled intercooler (Modified Fig. 4 above - A) is disposed at a point (see Modified Fig. 4 above at element 25 of element A) at which an intermediate temperature of a coolant in the liquid-cooled intercooler (Modified Fig. 4 above - A) is within twenty percent (±20%) of an exit temperature of the coolant at the subassembly cooler (Modified Fig. 4 above - I)(see Modified Fig. 4 above (structure is depicted such that element 25 of element A is shown at a point at which an intermediate temperature of a coolant in element A is capable of being within twenty percent (±20%) of an exit temperature of the coolant at element J). Re claim 29: Meeusen discloses an at least two-stage compressed air generator (30, two stage compressor - Para 92)(see Fig. 4), comprising: a liquid-cooled intercooler (Modified Fig. 4 above - A (person having ordinary skill in the art would recognize element A as a type of liquid-cooled intercooler; element A corresponds to an element 10 which is a “gas cooler” per Para 61 and which carries coolant as shown at C1 and as described in Para 62 which is liquid per Para 3)) for cooling precompressed air (Para 62 - “compressed gas originating from the compressor element 2…” (not described as air but structure of element 2 shown/described inherently capable of compressing air which is a type of gas)) discharged from a first compressor stage (Modified Fig. 4 above - B (person having ordinary skill in the art would recognize element B as a type of first compressor stage; element B corresponds to an element 2 which is a compressor element per Para 61)), the liquid-cooled intercooler (Modified Fig. 4 above - A) including a coolant inlet (Modified Fig. 4 above - C (person having ordinary skill in the art would recognize element C as a type of coolant inlet)) and a coolant outlet (Modified Fig. 4 above - D (person having ordinary skill in the art would recognize element D as a type of coolant outlet)), the coolant outlet (Modified Fig. 4 above - D) directly coupled to the coolant inlet (Modified Fig. 4 above - C) within the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above); a liquid-cooled aftercooler (Modified Fig. 4 above - E (person having ordinary skill in the art would recognize element E as a type of liquid-cooled intercooler; element E corresponds to an element 10 which is a “gas cooler” per Para 61 and which carries coolant as shown at C1 and as described in Para 62 which is liquid per Para 3)) for cooling air compressed by a second compressor stage (Modified Fig. 4 above - F (person having ordinary skill in the art would recognize element F as a type of second compressor stage; element F corresponds to an element 2 which is a compressor element per Para 61))(see Modified Fig. 4 above and Para 99), the liquid-cooled aftercooler (Modified Fig. 4 above - E) including a coolant inlet (Modified Fig. 4 above - G (person having ordinary skill in the art would recognize element G as a type of coolant inlet)) and a coolant outlet (Modified Fig. 4 above - H (person having ordinary skill in the art would recognize element H as a type of coolant outlet)), the coolant outlet (Modified Fig. 4 above - G) directly coupled to the coolant inlet (Modified Fig. 4 above - H) within the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above); a liquid-cooled subassembly cooler (Modified Fig. 4 above - K (person having ordinary skill in the art would recognize element K as a type of liquid-cooled subassembly cooler; element K corresponds to an element 22 which is a compressor element cooler per Para 69 which is liquid cooled as shown and per Para 73)) for absorbing heat from the compressed air generator (30)(see Fig. 4 and Para 73); wherein a coolant outlet (Modified Fig. 4 above - L (person having ordinary skill in the art would recognize element L as a type of coolant outlet of element K)) of the subassembly cooler (Modified Fig. 4 above - K) is connected to a feed inlet (25, intermediary point - Para 72) of the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above) and the coolant outlet (Modified Fig. 4 above - L) of the subassembly cooler (Modified Fig. 4 above - K) is directly connected to a feed inlet (25, intermediary point - Para 72) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above), and wherein the feed inlet (25) of the liquid-cooled intercooler (Modified Fig. 4 above - A) is disposed between the coolant inlet (Modified Fig. 4 above - C) of the liquid-cooled intercooler (Modified Fig. 4 above - A) and the coolant outlet (Modified Fig. 4 above - D) of the liquid-cooled intercooler (Modified Fig. 4 above - A)(see Modified Fig. 4 above), and wherein the feed inlet (25) of the liquid-cooled aftercooler (Modified Fig. 4 above - E) is disposed between the coolant inlet (Modified Fig. 4 above - G) of the liquid-cooled aftercooler (Modified Fig. 4 above - E) and the coolant outlet (Modified Fig. 4 above - H) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above). Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 13, 15-16, 22, 24-26, 28, and 30 are rejected under 35 U.S.C. 103 as being unpatentable over Meeusen et al. (U.S. 2018/0258952), as applied to claims 11, 20, and 29 above, in view of Holdsworth (U.S. 2007/0074535). Re claim 13: Meeusen discloses the compressed air generator (30) according to Claim 11 (as described above), further comprising a coolant circuit (17, cooling circuit - Para 62). Meeusen fails to disclose the coolant circuit including a main cooler having a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of the liquid-cooled intercooler, the liquid-cooled aftercooler, or the subassembly cooler, and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler or the liquid-cooled aftercooler. Holdsworth teaches an at least two-stage compressed air generator (10, screw compressor system - Para 12 (see Fig. 2)) comprising a coolant circuit (19, refrigerant circuit - Para 14) including a main cooler (48, condenser - Para 24) having a cold side (see Fig. 2 at line exiting element 48 and leading to element 54) and a hot side (see Fig. 2 at line leading to element 48 from elements 74), the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of a liquid-cooled intercooler (32, intercooler - Para 15), a liquid-cooled aftercooler (38, aftercooler - Para 18), or a subassembly cooler (58, second-stage air dryer heat exchanger - Para 19)(see Fig. 2 and Paras 15-20), and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler (32) or the liquid-cooled aftercooler (38)(see Fig. 2 and Paras 15-24). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have modeled the coolant circuit of Meeusen after that of Holdsworth, thereby including a main cooler with a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of the liquid-cooled intercooler of Meeusen, the liquid-cooled aftercooler of Meeusen, or the subassembly cooler of Meeusen, and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler of Meeusen or the liquid-cooled aftercooler of Meeusen all in the way taught by Holdsworth, for the advantage of being able to dump heat and cool the system (Holdsworth; Para 24). Re claim 15: Meeusen/Holdsworth teaches the compressed air generator (Meeusen; 30) according to Claim 13 (as described above), wherein the main cooler (Holdsworth; 48 (a main cooler as taught by Holdsworth has been included in the system of Meeusen as described above)) is one of a water-air cooler, a water-water cooler, or a combination cooler, which uses water and air optionally as a cooling medium (Holdsworth; Para 24). Re claim 16: Meeusen/Holdsworth teaches the compressed air generator (Meeusen; 30) according to Claim 14 (as described above), wherein the main cooler (Holdsworth; 48 (a main cooler as taught by Holdsworth has been included in the system of Meeusen as described above)) comprises a fan (Holdsworth; Para 24). Re claim 22: Meeusen discloses the compressed air generator (30) according to Claim 20 (as described above), further comprising a coolant circuit (17, cooling circuit - Para 62). Meeusen fails to disclose the coolant circuit including a main cooler having a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of the liquid-cooled intercooler, the liquid-cooled aftercooler, or the subassembly cooler, and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler or the liquid-cooled aftercooler. Holdsworth teaches an at least two-stage compressed air generator (10, screw compressor system - Para 12 (see Fig. 2)) comprising a coolant circuit (19, refrigerant circuit - Para 14) including a main cooler (48, condenser - Para 24) having a cold side (see Fig. 2 at line exiting element 48 and leading to element 54) and a hot side (see Fig. 2 at line leading to element 48 from elements 74), the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of a liquid-cooled intercooler (32, intercooler - Para 15), a liquid-cooled aftercooler (38, aftercooler - Para 18), or a subassembly cooler (58, second-stage air dryer heat exchanger - Para 19)(see Fig. 2 and Paras 15-20), and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler (32) or the liquid-cooled aftercooler (38)(see Fig. 2 and Paras 15-24). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have modeled the coolant circuit of Meeusen after that of Holdsworth, thereby including a main cooler with a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of the liquid-cooled intercooler of Meeusen, the liquid-cooled aftercooler of Meeusen, or the subassembly cooler of Meeusen, and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler of Meeusen or the liquid-cooled aftercooler of Meeusen all in the way taught by Holdsworth, for the advantage of being able to dump heat and cool the system (Holdsworth; Para 24). Re claim 24: Meeusen/Holdsworth teaches the compressed air generator (Meeusen; 30) according to Claim 22 (as described above), wherein the main cooler (Holdsworth; 48 (a main cooler as taught by Holdsworth has been included in the system of Meeusen as described above)) is one of a water-air cooler, a water-water cooler, or a combination cooler, which uses water and air optionally as a cooling medium (Holdsworth; Para 24). Re claim 25: Meeusen/Holdsworth teaches the compressed air generator (Meeusen; 30) according to Claim 22 (as described above), wherein the main cooler (Holdsworth; 48 (a main cooler as taught by Holdsworth has been included in the system of Meeusen as described above)) comprises a fan (Holdsworth; Para 24). Re claim 26: Meeusen/Holdsworth teaches the compressed air generator (Meeusen; 30) according to Claim 22 (as described above). Meeusen further discloses wherein a distributor unit (Modified Fig. 4 above - M (person having ordinary skill in the art would recognize element M as a type of distributor unit)) is disposed between the coolant outlet (Modified Fig. 4 above - J) of the subassembly cooler (Modified Fig. 4 above - I) and the feed inlets of the plurality of feed inlets (Modified Fig. 4 above - C and element 25)(see Modified Fig. 4 above), wherein the distributor unit (Modified Fig. 4 above - M) selectively supplies the plurality of feed inlets (see Modified Fig. 4 above at element 39 and paras 95-96). Re claim 28: Meeusen/Holdsworth teaches the compressed air generator (Meeusen; 30) according to Claim 22 (as described above). Meeusen further discloses wherein the coolant outlet (Modified Fig. 4 above - J) of the subassembly cooler (Modified Fig. 4 above - I) is connected to the feed inlet (25) of the liquid-cooled intercooler (Modified Fig. 4 above - A) and the feed inlet (25) of the liquid-cooled aftercooler (Modified Fig. 4 above - E)(see Modified Fig. 4 above). Re claim 30: Meeusen discloses the compressed air generator (30) according to Claim 29 (as described above), further comprising a coolant circuit (17, cooling circuit - Para 62). Meeusen fails to disclose the coolant circuit including a main cooler having a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of the liquid-cooled intercooler, the liquid-cooled aftercooler, or the subassembly cooler, and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler or the liquid-cooled aftercooler. Holdsworth teaches an at least two-stage compressed air generator (10, screw compressor system - Para 12 (see Fig. 2)) comprising a coolant circuit (19, refrigerant circuit - Para 14) including a main cooler (48, condenser - Para 24) having a cold side (see Fig. 2 at line exiting element 48 and leading to element 54) and a hot side (see Fig. 2 at line leading to element 48 from elements 74), the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of a liquid-cooled intercooler (32, intercooler - Para 15), a liquid-cooled aftercooler (38, aftercooler - Para 18), or a subassembly cooler (58, second-stage air dryer heat exchanger - Para 19)(see Fig. 2 and Paras 15-20), and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler (32) or the liquid-cooled aftercooler (38)(see Fig. 2 and Paras 15-24). It would have been obvious to one having ordinary skill in the art before the effective filing date of the claimed invention to have modeled the coolant circuit of Meeusen after that of Holdsworth, thereby including a main cooler with a cold side and a hot side, the cold side configured to feed a cooled coolant having a low temperature respectively to at least one of the liquid-cooled intercooler of Meeusen, the liquid-cooled aftercooler of Meeusen, or the subassembly cooler of Meeusen, and the hot side configured to receive heated coolant delivered by at least one of the liquid-cooled intercooler of Meeusen or the liquid-cooled aftercooler of Meeusen all in the way taught by Holdsworth, for the advantage of being able to dump heat and cool the system (Holdsworth; Para 24). Allowable Subject Matter Claims 14, 18-19, 23, and 27 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: Claims 14, 18-19, 23, and 27 would be allowed primarily because the prior art of record cannot anticipate Applicant’s claimed invention by a single reference nor render Applicant’s claimed invention obvious by the combination of more than one reference. Additionally, the prior art of record does not teach “wherein a heat exchanger is disposed in the coolant circuit respectively between the coolant outlet of the liquid-cooled intercooler and the hot side of the main cooler, and the coolant outlet of the liquid-cooled aftercooler and the hot side of the main cooler” as within the context of the claimed invention as disclosed and within the context of the other limitations present in claims 14 and 23. Additionally, the prior art of record does not teach “wherein at least the liquid-cooled intercooler, the liquid-cooled aftercooler, the subassembly cooler, a heat exchanger, the first compressor stage, the second compressor stage, and an electronic control unit are disposed within a common device housing” as within the context of the claimed invention as disclosed and within the context of the other limitations present in claims 18-19, and 27. Therefore, the prior art of record cannot anticipate Applicant’s claimed invention by a single reference nor render Applicant’s claimed invention obvious by one or more references. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Loren C Edwards whose telephone number is (571)272-7133. The examiner can normally be reached M-R 6AM-430PM. Examiner interviews are available via telephone, in-person, and video conferencing using a USPTO supplied web-based collaboration tool. To schedule an interview, applicant is encouraged to use the USPTO Automated Interview Request (AIR) at http://www.uspto.gov/interviewpractice. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Mark Laurenzi can be reached at (571) 270-7878. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of published or unpublished applications may be obtained from Patent Center. Unpublished application information in Patent Center is available to registered users. To file and manage patent submissions in Patent Center, visit: https://patentcenter.uspto.gov. Visit https://www.uspto.gov/patents/apply/patent-center for more information about Patent Center and https://www.uspto.gov/patents/docx for information about filing in DOCX format. For additional questions, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /LOREN C EDWARDS/Primary Examiner, Art Unit 3746 1/9/26
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Prosecution Timeline

Show 2 earlier events
Dec 15, 2025
Examiner Interview Summary
Dec 15, 2025
Applicant Interview (Telephonic)
Dec 15, 2025
Response Filed
Jan 12, 2026
Final Rejection mailed — §102, §103
Mar 12, 2026
Response after Non-Final Action
Apr 10, 2026
Request for Continued Examination
Apr 22, 2026
Response after Non-Final Action
May 07, 2026
Examiner Interview (Telephonic)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

2-3
Expected OA Rounds
82%
Grant Probability
99%
With Interview (+28.2%)
2y 5m (~1y 0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 661 resolved cases by this examiner. Grant probability derived from career allowance rate.

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