Prosecution Insights
Last updated: April 19, 2026
Application No. 17/858,520

DEVICE AND PROCESS FOR CONTINUOUS OHMIC HEATING OF FOODSTUFFS

Non-Final OA §103§112
Filed
Jul 06, 2022
Examiner
KHLOK, BONITA
Art Unit
3761
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Deutsches Institut Für Lebensmitteltechnik E V
OA Round
1 (Non-Final)
50%
Grant Probability
Moderate
1-2
OA Rounds
4y 2m
To Grant
99%
With Interview

Examiner Intelligence

Grants 50% of resolved cases
50%
Career Allow Rate
99 granted / 200 resolved
-20.5% vs TC avg
Strong +49% interview lift
Without
With
+49.2%
Interview Lift
resolved cases with interview
Typical timeline
4y 2m
Avg Prosecution
42 currently pending
Career history
242
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
51.8%
+11.8% vs TC avg
§102
18.3%
-21.7% vs TC avg
§112
26.6%
-13.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 200 resolved cases

Office Action

§103 §112
DETAILED ACTION 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 . Election/Restriction Response Applicant’s election of Group I without traverse (claims 1-15) and Species 1 with traverse (Fig. 1) in the reply filed on 09/09/2025 is acknowledged. The Applicant’s arguments on p. 06 of the Remarks with respect to species election requirement are persuasive, therefore the species election requirement is withdrawn. The status of the 09/09/2025 claims, is as follows: Claims 16-18 have been canceled; and Claims 1-15 are pending. Priority Acknowledgment is made of applicant’s claim for foreign priority under 35 U.S.C. 119 (a)-(d). The certified copy has been filed in Application No. DE 102021207153.8 filed on 07/07/2021. Information Disclosure Statement The (1) information disclosure statements (IDS) submitted on 10/06/2022 is in compliance with the provisions of 37 CFR 1.97. Accordingly, the information disclosure statement is being considered by the examiner. Claim Objections Claim 12 is objected to because of the following informalities: In claim 12: The phrase “the channel inlet” in line 3 should be read “a channel inlet” because it is the first instance of “channel inlet” recited. Appropriate correction is required. Claim Interpretation The following is a quotation of 35 U.S.C. 112(f): (f) Element in Claim for a Combination. – An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The following is a quotation of pre-AIA 35 U.S.C. 112, sixth paragraph: An element in a claim for a combination may be expressed as a means or step for performing a specified function without the recital of structure, material, or acts in support thereof, and such claim shall be construed to cover the corresponding structure, material, or acts described in the specification and equivalents thereof. The claims in this application are given their broadest reasonable interpretation using the plain meaning of the claim language in light of the specification as it would be understood by one of ordinary skill in the art. The broadest reasonable interpretation of a claim element (also commonly referred to as a claim limitation) is limited by the description in the specification when 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is invoked. As explained in MPEP § 2181, subsection I, claim limitations that meet the following three-prong test will be interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph: (A) the claim limitation uses the term “means” or “step” or a term used as a substitute for “means” that is a generic placeholder (also called a nonce term or a non-structural term having no specific structural meaning) for performing the claimed function; (B) the term “means” or “step” or the generic placeholder is modified by functional language, typically, but not always linked by the transition word “for” (e.g., “means for”) or another linking word or phrase, such as “configured to” or “so that”; and (C) the term “means” or “step” or the generic placeholder is not modified by sufficient structure, material, or acts for performing the claimed function. Use of the word “means” (or “step”) in a claim with functional language creates a rebuttable presumption that the claim limitation is to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites sufficient structure, material, or acts to entirely perform the recited function. Absence of the word “means” (or “step”) in a claim creates a rebuttable presumption that the claim limitation is not to be treated in accordance with 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. The presumption that the claim limitation is not interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, is rebutted when the claim limitation recites function without reciting sufficient structure, material or acts to entirely perform the recited function. Claim limitations in this application that use the word “means” (or “step”) are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. Conversely, claim limitations in this application that do not use the word “means” (or “step”) are not being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, except as otherwise indicated in an Office action. This application includes one or more claim limitations that do not use the word “means,” but are nonetheless being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, because the claim limitation(s) uses a generic placeholder that is coupled with functional language without reciting sufficient structure to perform the recited function and the generic placeholder is not preceded by a structural modifier. Such claim limitations are: In claim 9: The limitation “a conveying device” in line 2 “device” is the generic placeholder. “conveying” is the functional language. In claim 10: The limitation “a cooling device” in lines 1-2 “device” is the generic placeholder. “cooling” is the functional language. In claim 13: The limitation “a cooling system” in lines 1-2 “system” is the generic placeholder. “cooling” is the functional language. In claim 14: The limitation “at least one dosing device” in line 3 “device” is the generic placeholder. “dosing” is the functional language. Because this/these claim limitation(s) is/are being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, it/they is/are being interpreted to cover the corresponding structure described in the specification as performing the claimed function, and equivalents thereof. A review of the specification shows that, the following appears to be the corresponding structure described in the specification for the 35 U.S.C. 112, sixth paragraph limitation: The limitation “a conveying device" in line 2 of claim 9 has been describes in published specification para. 0036 as a circulating belt 16. If applicant does not intend to have this/these limitation(s) interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, applicant may: (1) amend the claim limitation(s) to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph (e.g., by reciting sufficient structure to perform the claimed function); or (2) present a sufficient showing that the claim limitation(s) recite(s) sufficient structure to perform the claimed function so as to avoid it/them being interpreted under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 10-14 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for pre-AIA the inventor(s), at the time the application was filed, had possession of the claimed invention. In claim 12: The limitation “the cooling device is arranged to introduce cooling liquid at an outlet end and/or via a channel upper side and/or via a channel lid side, and to bleed cooling liquid at the channel inlet and/or at a channel bottom.” is not supported in the original disclosure. In the published specification para. 0025, it is stated that that the cooling device is set up to cool liquid contained in the channel, in particular to cool liquid taken from a bleed conduit connected in the area of the outlet end outside the channel and to convey it into the channel through an inlet conduit connected in the area of the channel inlet. Optionally, the liquid to be cooled is introduced at the outlet end and/or via channel upper side/channel lid side and discharged at the channel inlet and/or at the channel bottom side. In other words, the “cooling liquid” is actually the liquid to be cooled. Therefore, there is a presumption that the applicant didn’t possess the invention at the time of filing, i.e. lack of written description. In claim 10: The corresponding structure of “a cooling device” in lines 1-2 is not supported in the original disclosure as interpreted under 35 U.S.C 112(f). Therefore, since the Specification does not clearly identify what the corresponding structure of the “a cooling device” is, there is a presumption that the applicant didn’t possess the invention at the time of filing, i.e. lack of written description. In claim 13: The corresponding structure of “a cooling system” in lines 1-2 is not supported in the original disclosure as interpreted under 35 U.S.C 112(f). Therefore, since the Specification does not clearly identify what the corresponding structure of the “a cooling system” is, there is a presumption that the applicant didn’t possess the invention at the time of filing, i.e. lack of written description. In claim 14: The corresponding structure of “a dosing device” in line 3 is not supported in the original disclosure as interpreted under 35 U.S.C 112(f). Therefore, since the Specification does not clearly identify what the corresponding structure of the “a dosing device” is, there is a presumption that the applicant didn’t possess the invention at the time of filing, i.e. lack of written description. The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-15 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor, or for pre-AIA the applicant regards as the invention. In claim 9: The limitation "wo conveyor belts" in line 3 renders the claim indefinite because it is unclear what the limitation is intended to mean. For the purpose of substantive examination, it is presumed to read “two conveyor belts”. In claim 12: The limitation “the cooling device is arranged to introduce cooling liquid at an outlet end and/or via a channel upper side and/or via a channel lid side, and to bleed cooling liquid at the channel inlet and/or at a channel bottom.” renders the claim indefinite because it is unclear how this is achieved and there is no figure that shows that the cooling device is arranged to bleed cooling liquid at the channel inlet and/or at a channel bottom. However, according to para. 0025 of the published specification, “cooling liquid” actually refers to the liquid to be cooled. For the purpose of substantive examination, it is presumed to read “the cooling device is arranged to introduce the liquid to be cooled at an outlet end and/or via a channel upper side and/or via a channel lid side, and to bleed the liquid to be cooled at the channel inlet and/or at a channel bottom”. In claim 1: The claim limitation “a cooling device” in lines 1-2 invokes 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, as noted above. However, the written description fails to disclose the corresponding structure, material, or acts for performing the entire claimed function and to clearly link the structure, material, or acts to the function. In the original specification, “a cooling device” is not disclosed structurally. The proper structure must be disclosed in a way that one of ordinary skill in the art will understand what the inventor has identified to perform the recited function. In claim 13: The claim limitation “a cooling system” in lines 1-2 invokes 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, as noted above. However, the written description fails to disclose the corresponding structure, material, or acts for performing the entire claimed function and to clearly link the structure, material, or acts to the function. In the original specification, “a cooling system” is not disclosed structurally. The proper structure must be disclosed in a way that one of ordinary skill in the art will understand what the inventor has identified to perform the recited function. In claim 14: The claim limitation “at least one dosing device” in line 3 invokes 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph, as noted above. However, the written description fails to disclose the corresponding structure, material, or acts for performing the entire claimed function and to clearly link the structure, material, or acts to the function. In the original specification, “at least dosing device” is not disclosed structurally. The proper structure must be disclosed in a way that one of ordinary skill in the art will understand what the inventor has identified to perform the recited function. Therefore, the claim is indefinite and is rejected under 35 U.S.C. 112(b) or pre-AIA 35 U.S.C. 112, second paragraph. Applicant may: (a) Amend the claim so that the claim limitation will no longer be interpreted as a limitation under 35 U.S.C. 112(f) or pre-AIA 35 U.S.C. 112, sixth paragraph; (b) Amend the written description of the specification such that it expressly recites what structure, material, or acts perform the entire claimed function, without introducing any new matter (35 U.S.C. 132(a)); or (c) Amend the written description of the specification such that it clearly links the structure, material, or acts disclosed therein to the function recited in the claim, without introducing any new matter (35 U.S.C. 132(a)). If applicant is of the opinion that the written description of the specification already implicitly or inherently discloses the corresponding structure, material, or acts and clearly links them to the function so that one of ordinary skill in the art would recognize what structure, material, or acts perform the claimed function, applicant should clarify the record by either: (a) Amending the written description of the specification such that it expressly recites the corresponding structure, material, or acts for performing the claimed function and clearly links or associates the structure, material, or acts to the claimed function, without introducing any new matter (35 U.S.C. 132(a)); or (b) Stating on the record what the corresponding structure, material, or acts, which are implicitly or inherently set forth in the written description of the specification, perform the claimed function. For more information, see 37 CFR 1.75(d) and MPEP §§ 608.01(o) and 2181. 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 set forth in Graham v. John Deere Co., 383 U.S. 1, 148 USPQ 459 (1966), that are applied 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 1-3, and 6-12 are rejected under 35 U.S.C. 103 as being unpatentable over Sastry (US 20080233250) in view of MacFarlane (US 2158136) Regarding Claim 1, Sastry discloses a device (treatment zone 1000) for continuously heating foodstuffs (para. 0095; figs. 8-9. The tub 1 comprises a treatment chamber 1000 that allows fluid to be continuously heated), comprising a channel (tub 1) arranged to receive an electrically conductive liquid (electrically conductive fluid) (“an electrically conductive fluid in which produce is immersed”, para. 0058), mutually opposite electrodes (electrodes 2a-n, 2b-n; fig. 10) are arranged in pairs on side walls of the channel and are connected to a current source (power source 3) (para. 0113; figs. 1 and 8), wherein a first pair of the mutually opposite electrodes (electrodes 2a-1, 2b-1; figs. 10 and 8) is arranged on the side walls at a distance along the channel (para. 0113; fig. 10), a second pair of the mutually opposite electrodes (electrodes 2a-2, 2b-2; figs. 10 and 8) is arranged in electrical contact with an interior of the channel (para. 0113). PNG media_image1.png 562 676 media_image1.png Greyscale Sastry does not disclose each of the pairs of electrodes is electrically connected to a respective one of separate secondary windings of a transformer of the current source and the secondary windings are arranged to be excited by at least one primary winding of the transformer of the current source. However, MacFarlane discloses each of the pairs of electrodes (pairs of electrodes 11, 12, and 13) is electrically connected to a respective one of separate secondary windings of a transformer of the current source (secondary windings 21s, 22s, and 23s of transformer 21, 22, 23) and the secondary windings (secondary windings 21s, 22s, and 23s) are arranged to be excited by at least one primary winding of the transformer of the current source (primary windings 21p, 22p, 23p) (col. 2, lines 29-44). PNG media_image2.png 706 498 media_image2.png Greyscale Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify each of the pairs of electrodes of is electrically connected to a respective one of separate secondary windings of the transformer of the current source and the secondary windings are arranged to be excited by at least one primary winding of the transformer of the current source as taught by MacFarlane, in order to supply substantially uniform current through each pair of the electrodes, thereby generate uniform heat across the channel (col. 2, lines 40-44 of MacFarlane). Regarding Claim 2, Sastry discloses the device (treatment zone 1000), wherein the side walls are arranged vertically (side walls of zone 1000; fig. 10) and the channel comprises a bottom which is flat and is arranged horizontally and connects the side walls (“the treatment zone 1000 is a hollow elongated cube or rectangular shape”, para. 0096; figs. 8 and 10). Regarding Claim 3, the modification discloses substantially all of the claimed features as set forth above, wherein the side walls (side walls of the tub 1) are arranged at a spacing. The modification does not disclose the spacing equal to the diameter of the foodstuff multiplied by a factor of 1.05 to 1.5. However, it would have been obvious to one having ordinary skill in the art at the time the invention was made to modify the spacing between the side walls of the channel (i.e. tub 1) to be equal to the diameter of the foodstuff multiplied by a factor of 1.05 to 1.5, since it has been held that rearranging parts of an invention involves only routine skill in the art. The motivation is to ensure the food won’t get stuck to the side walls of the tub 1 because the spacing of the side walls is larger than the food. Regarding Claim 6, Sastry discloses the device (treatment zone 1000), wherein the current source (power source 3) is configured to apply different electrical power to each of the pairs of electrodes (electrode set 2a-n, 2b-n) (para. 0113) (it is noted the power source 3 supplies power to electrode set 2a-n, 2b-n between on and off operation). Regarding Claim 7, Sastry discloses the device (treatment zone 1000), comprising, below the channel (tub 1), a conveying device (belt 8) comprising a belt (belt 8) driven to rotate along the channel (tub 1) (para. 0099-0100; fig. 8), the conveying device having push elements (divider 130) that extend into the channel (fig. 8) and are arranged to move along the channel from an inlet end (40) towards and outlet end (30) with rotation of the belt (fig. 8). Regarding Claim 8, Sastry discloses the device (treatment zone 1000), comprising a conveying device (pump 180) formed by a pump (pump 180) connected to the channel (tub 1) by a bleed conduit (annotated fig. 9) connected in a region of an outlet end (40) and by an inlet conduit (annotated fig. 9) connected in the region of an inlet end (30), the pump being configured to bleed liquid from the bleed conduit and to press it into the inlet conduit (para. 0112). PNG media_image3.png 532 1019 media_image3.png Greyscale Regarding Claim 9, Sastry discloses the device (treatment zone 1000), comprising a pulling device (belt 8) arranged as a conveying device (belt 8) at an outlet end of the channel (outlet 40) (fig. 8), the pulling device (belt 8) comprising a rotationally driven wheel (wheel 140) (“conveyor belt 8 is driven by at least one wheel 140 or 150”, para. 0101). Regarding Claim 10, Sastry discloses the device (treatment zone 1000), comprising a cooling device (heat exchanger 190) arranged to cool liquid (fluid) contained in the channel (tub 1) (para. 0112; fig. 9) (it is noted the heat exchanger 190 is configured to cool fluid in the tub 1). Regarding Claim 11, Sastry discloses the device (treatment zone 1000), wherein the cooling device (heat exchanger 190) is arranged to cool liquid (fluid) bled from a bleed conduit (annotated fig. 9) connected in the region of an outlet end (outlet 40) to outside the channel (tub 1) and to convey it into the channel (tub 1) through an inlet conduit (annotated fig. 9) connected in the region of an inlet end (inlet 30) (para. 0112). PNG media_image3.png 532 1019 media_image3.png Greyscale Regarding Claim 12, Sastry discloses the device (treatment zone 1000), wherein the cooling device (heat exchanger 190) is arranged to introduce cooling liquid (fluid) at an outlet end (annotated fig. 9), and to bleed cooling liquid at the channel inlet (inlet 30) (para. 0112). PNG media_image4.png 545 676 media_image4.png Greyscale Claims 4-5 are rejected under 35 U.S.C. 103 as being unpatentable over the modification of Sastry (US 20080233250) and MacFarlane (US 2158136) as applied to claim 1, further in view of Maroofian (US 20190106243) Regarding Claim 4, the modification discloses substantially all of the claimed features as set forth above, except wherein the spacing of the side walls varies along the channel. However, Maroofian discloses a container 100, wherein the spacing of the side walls varies along the channel (annotated fig. 1). PNG media_image5.png 520 734 media_image5.png Greyscale Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to replace the tub 1 of Sastry with the container of Maroofian that has the spacing of the side walls varies along the channel as taught by Marrofian, because it involves a simple substitution of one known device for another to obtain a predictable result, which is to contain heated fluid. Regarding Claim 5, Maroofian discloses the spacing of the side walls widens conically from an inlet end to an outlet end (figs. 1 and 4) (it is noted the spacing of the side walls widens conically in the vertical direction from the inlet end of the container to the outlet end of the container). PNG media_image6.png 578 781 media_image6.png Greyscale PNG media_image7.png 361 857 media_image7.png Greyscale Claim 13 is rejected under 35 U.S.C. 103 as being unpatentable over the modification of Sastry (US 20080233250) and MacFarlane (US 2158136) as applied to claim 1, further in view of Fooks (US 1575198) Regarding Claim 13, the modification discloses substantially all of the claimed features as set forth above, except comprising a cooling system arranged to cool heated foodstuffs by sprinkling with water, wherein the device has a conduit which is arranged to conduct water emerging from the cooling system, with which the foodstuffs have been sprinkled, into the channel by an inlet conduit connected in the region of an inlet end. However, Fooks discloses a cooling system (supply pipes 7 and nozzles 8) arranged to cool heated foodstuffs by sprinkling with water (“apparatus for cooking and cooling substances in sealed receptacles,”, p. 01, lines 12-18), wherein the device has a conduit (supply pipes 7) which is arranged to conduct water (water) emerging from the cooling system, with which the foodstuffs (receptacles) have been sprinkled, into the channel (container 1) by an inlet conduit (supply pipes 7) connected in the region of an inlet end (annotated fig. 1). PNG media_image8.png 463 702 media_image8.png Greyscale Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the cooling system arranged to cool heated foodstuff by sprinkling with water, as taught by Fooks recited above, in order to cool the heated foodstuff by sprinkling with water to achieve desired heating temperature of the heated foodstuff. Claim 14 is rejected under 35 U.S.C. 103 as being unpatentable over the modification of Sastry (US 20080233250) and MacFarlane (US 2158136) as applied to claim 1, further in view of Funk (US 20010048958) Regarding Claim 14, the modification discloses substantially all of the claimed features as set forth above, except comprising a conductivity sensor arranged to measure electrical conductivity of the liquid in the channel or in one of the conduits connected thereto, and at least one dosing device for salt, salt solution or water, which is controlled as a function of the conductivity sensor and is connected to the channel. However, Funk discloses a conductivity sensor (conductance sensor 30) arranged to measure electrical conductivity of the liquid in the channel (chamber 46), and at least one dosing device (concentrate dispenser 32) for water (para. 0003), which is controlled as a function of the conductivity sensor (conductance sensor 30) and is connected to the channel (para. 0022). PNG media_image9.png 752 534 media_image9.png Greyscale Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the device to include the conductivity sensor arranged to measure the electrical conductivity of the liquid in the channel and to include the dosing device for water, which is controlled as the function of the conductivity sensor and is connected to the channel as taught by Funk, in order to achieve desired concentration of the fluid having the desired electrical conductivity to increase the consistency, repeatability, uniformity and accuracy of the concentration of the fluid in the channel (para. 0023 of Funk). Claim 15 is rejected under 35 U.S.C. 103 as being unpatentable over the modification of Sastry (US 20080233250) and MacFarlane (US 2158136) as applied to claim 1, further in view of Muehlhoefer (US 20120092895) and Nagano (US 4222098) Regarding Claim 15, the modification discloses substantially all of the claimed features as set forth above, except wherein the transformer has two or more primary windings driven in phase by separate clock generators. However, Muehlhoefer discloses the transformer (transformer 70; fig. 3) has two or more primary windings (first and second windings 72, 74) driven by clock generators (transistors 80, 90) (para. 0025-0026 and 0029). PNG media_image10.png 360 452 media_image10.png Greyscale Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the transformer of Sastry in view of MacFarlane to have two or more primary windings driven by separate clock generators as taught by Muehlhoefer, in order to yield different absolute values at the output of the transformer by driving the one or more primary windings by the clock generators (para. 0025 of Muehlhoefer) such that the desired heating power is applied to the electrodes. The modification does not disclose the one or more primary windings are driven in phase by separate clock generators. However, Nagano discloses the one or more primary windings (two primary windings of transformer T1) are driven in phase by separate clock generators (col. 4, lines 5-25; fig. 2). PNG media_image11.png 395 869 media_image11.png Greyscale Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the one or more primary windings of Sastry in view of MacFarlane and Muehlhoefer to be driven in phase by separate clock generators as taught by Nagano, to ensure equal amount of current going through the transistors which prolongs the longevity of the transistors (col. 3, 4 lines 40-54, 27-40 respectively of Nagano). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to BONITA KHLOK whose telephone number is (571)270-7313. The examiner can normally be reached on M-F: 9:00am-6pm. 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, Helena Kosanovic can be reached on (571)272-9059. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair-direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /BONITA KHLOK/ Examiner, Art Unit 3761 /SANG Y PAIK/ Primary Examiner, Art Unit 3761
Read full office action

Prosecution Timeline

Jul 06, 2022
Application Filed
Nov 25, 2025
Non-Final Rejection — §103, §112 (current)

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APPARATUS FOR PRODUCING NON-SPLATTER COOKING OIL
2y 5m to grant Granted Mar 24, 2026
Patent 12551045
GRINDER AND COFFEE MACHINE HAVING SUCH A GRINDER
2y 5m to grant Granted Feb 17, 2026
Patent 12544849
METHOD FOR CONTROLLING A WELDING PROCESS
2y 5m to grant Granted Feb 10, 2026
Patent 12520965
COLLAPSIBLE CAMPING STOVE
2y 5m to grant Granted Jan 13, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
50%
Grant Probability
99%
With Interview (+49.2%)
4y 2m
Median Time to Grant
Low
PTA Risk
Based on 200 resolved cases by this examiner. Grant probability derived from career allow rate.

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