Prosecution Insights
Last updated: July 17, 2026
Application No. 18/195,490

CHILLED BEAM WITH FANS

Non-Final OA §103
Filed
May 10, 2023
Priority
May 12, 2022 — provisional 63/341,222
Examiner
DELEON, DARIO ANTONIO
Art Unit
3763
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Mestek Inc.
OA Round
4 (Non-Final)
63%
Grant Probability
Moderate
4-5
OA Rounds
0m
Est. Remaining
97%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allowance Rate
125 granted / 199 resolved
-7.2% vs TC avg
Strong +34% interview lift
Without
With
+34.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
32 currently pending
Career history
244
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
92.3%
+52.3% vs TC avg
§102
1.5%
-38.5% vs TC avg
§112
5.7%
-34.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 199 resolved cases

Office Action

§103
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 . Status This Office Action is in response to the remarks and amendments filed on 05/11/2026. The 35 U.S.C. 112A/B rejections are withdrawn. Claims 1-3, 5-9 and 11-12 remain pending for consideration on the merits. Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 05/11/2026 has been entered. Claim Rejections - 35 USC § 103 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claims 1, 3, 5-7, 9 and 11 are rejected under 35 U.S.C. 103 as being unpatentable over Li (CN 210118857 U) in view of Broach (US 11680715 B, hereinafter Broach) and Nilsson (US 20170122611 A1, hereinafter Nilsson). Regarding claim 1, Li teaches a chilled beam unit (ultra-thin absorbing top air conditioner, abstract) for use in treating indoor air (the indoor air will pass through the 40 airflow channels, paragraph 0018), comprising: a manifold (front shell 29) having at least one induction aperture (via air flow channels 40, figure 2) and at least one discharge slot (air outlets 30, figure 2), said induction aperture enabling a passage of said indoor air (the indoor air will pass through the 40 airflow channels, paragraph 0018) into said chilled beam unit (as shown on figure 2) from a space below said chilled beam unit (as shown on figure 2), and a heat exchanger (fin type evaporator plate 23, figures 2-3) mounted within said manifold (within front shell 29, figures 2-3) on an upstream side of said array of fans (upstream of axial flow fans 17, as shown on figures 2-3) and configured to accept a flow of indoor air (the indoor air will pass through the 40 airflow channels, paragraph 0018) therethrough (air inlet surface of the 23-fin evaporator). Li teaches the invention as described above but fail to teach said discharge slot enabling a falling out of said chilled beam unit of said indoor air that has been treated within said chilled beam unit via an inherent separation of warmer treated air from cooler treated air. However, Broach teaches said discharge slot (via air 121, figure 1a) enabling a falling out of said chilled beam unit (exiting two-stage evaporative cooling, as shown on figure 1a) of said indoor air (intake air 101) that has been treated within said chilled beam unit (via first stage heat exchanger 110, figure 1a) via an inherent separation (via chilled air 111, figure 1a) of warmer treated air from cooler treated air (as shown on figure 1a). Therefore, it would have been obvious to a person skilled in the art before the effective filing date of the invention to modify the unit in the teachings of Li to include said discharge slot enabling a falling out of said chilled beam unit of said indoor air that has been treated within said chilled beam unit via an inherent separation of warmer treated air from cooler treated air in view of the teachings of Broach in order to yield the predictable results of exhausting humidified chilled air. The combined teachings teach the invention as described above but fail to teach at least one fan mounted within said manifold about said induction aperture and configured to induce a flow of air from said space below said chilled beam unit into said chilled beam unit through said induction aperture. However, Nilsson teaches at least one fan (the primary supply air flow is increased, paragraph 0010, interpreted to be increased via a fan or blower) mounted within said manifold (chilled beam 2, figure 2b) about said induction aperture (air flow L2 via heat exchanger 10, figure 2b) and configured to induce a flow of air from said space below (as shown on figure 2b) said chilled beam unit (air treatment device 1) into said chilled beam unit through said induction aperture (as shown on figure 2b). Therefore, it would have been obvious to a person skilled in the art before the effective filing date of the invention to modify the unit in the teachings of Li to include at least one fan mounted within said manifold about said induction aperture and configured to induce a flow of air from said space below said chilled beam unit into said chilled beam unit through said induction aperture in view of the teachings of Nilsson in order to yield the predictable results of controlling a supply air flow to a premises and conditioning of the indoor air. Further, it is understood, claim 1 includes an intended use recitation, for example “…configured to...”. The applicant is reminded that a recitation with respect to the manner which a claimed apparatus is intended to be does not differentiate the claimed apparatus from a prior art apparatus satisfying the structural limitations of the claims, as is the case here. While features of an apparatus may be recited either structurally or functionally, the claims are directed to an apparatus must be distinguished from the prior art in terms of structure rather than function. Regarding claims 3 and 7, the combined teachings teach further comprising at least one temperature sensor (temperature sensor 22 of Li) mounted on the heat exchanger (mounted on fin type evaporator plate 23, as shown on figure 1 of Li). Regarding claim 5, the combined teachings, as modified, teach a heating and air conditioning unit (ultra-thin absorbing top air conditioner, abstract of Li) for treating an enclosed environment (the indoor air will pass through the 40 airflow channels, paragraph 0018 of Li), comprising: a manifold (front shell 29 of Li) having an induction aperture (via air flow channels 40, figure 2 of Li) and a discharge slot (air outlets 30, figure 2 of Li), said induction aperture permitting passage of ambient air (the indoor air will pass through the 40 airflow channels, paragraph 0018 of Li) into said heating and air conditioning unit (as shown on figure 2 of Li) from said enclosed environment (conditioner indoor unit is used in most of the wall hanging of Li), and said discharge slot (via air 121, figure 1a of Broach) permitting a passive egress of treated air (via intake air 101, chilled air 111 and chilled air 121, as shown on figure 1a of Broach) from said heating and air conditioning unit (two-stage evaporative cooling, as shown on figure 1a of Broach) back to said enclosed environment (as shown on figure 1a of Broach) via inherent thermal separation; an array of fans (the primary supply air flow is increased, paragraph 0010 of Nilsson, interpreted to be increased via a fan or blower, corresponding to array fans 166 of Gupte) mounted within said manifold (chilled beam 2, figure 2b of Nilsson) in communication with said induction aperture (air flow L2 via heat exchanger 10, figure 2b of Nilsson), said array of fans selectively inducing a flow of said ambient air from said enclosed environment (as shown on figure 2 of Nilsson) and into said heating and air conditioning unit (air treatment device 1 of Nilsson) through said induction aperture (as shown on figure 2 of Nilsson); and a heat exchanger (heat exchanger 10 of Nilsson) mounted within said manifold (as shown on figure 2 of Nilsson) on an upstream side of said array of fans, said heat exchanger thereby treating said flow of ambient air pulled therethrough via said array of fans (as described in paragraph 0015 of Nilsson). Regarding claim 6, the combined teachings teach wherein: said discharge slot (air outlets 30, figure 2 of Li) extends the length of said manifold (outlets 30 extending the entire length of front shell 29, as shown on figure 1 of Li). Regarding claim 9, the combined teachings teach wherein: said heat exchanger (fin type evaporator plate 23, figures 2-3 of Li) includes fluid carrying piping (refrigerating pipeline inlet 53 and refrigerating pipeline outlet 54, as shown on figure 1 of Li). Regarding claim 11, it is noted that although the preamble of claim 11 is directed towards a method, the structure of the combined teachings discloses all the structure being provided in the method steps, thus the method is also anticipated by the combined teachings. If a prior art device, in its normal and usual operation, would necessarily perform the method claimed, then the method claimed will be considered to be anticipated or rendered obvious by the prior art device. When the prior art device is the same as a device described in the specification for carrying out the claimed method, it can be assumed the device will inherently or obviously perform the claimed process. Thus, the method, as claimed, would necessarily result from the normal operation of the apparatus. See MPEP 2112.02. Claim 2 is rejected under 35 U.S.C. 103 as being unpatentable over Li as modified by Broach and Nilsson as applied to claim 1 above, and further in view of Gupte et al (US 20190353387 A1, hereinafter Gupte). Regarding claim 2, the combined teachings teach the invention as described above but fail to teach wherein the at least one fan is an array of fans. However, Gupte teaches wherein the at least one fan (array of fans 166) is an array of fans (as shown on figures 6-7). Therefore, it would have been obvious to a person skilled in the art before the effective filing date of the invention to modify the unit in the combined teachings to include at least one fan mounted within said manifold about said induction aperture and configured to induce a flow of air from said space below said chilled beam unit into said chilled beam unit through said induction aperture in view of the teachings of Gupte in order to yield the predictable results of enabling enhanced control of the airflow and may increase an efficiency of the heat exchanger and the HVAC system. Claim 8 is rejected under 35 U.S.C. 103 as being unpatentable over Li as modified by Broach and Nilsson as applied to claim 7 above, and further in view of Takeda et al (US 20040007000 A1) and Kinoshita et al (US 20120023989 A1). Regarding claim 8, the combined teachings teach the invention as described above but fail to teach wherein: said temperature sensor in concert with a controller of said chilled beam unit turns on said fan when said temperature sensor determines said heat exchanger is below a predetermined temperature. However, Takeda teaches wherein: said temperature sensor (temperature sensor 233) turns on said fan (switch 225 is closed so that air that has been subject to heat exchange with the indoor heat exchanger 125 by the indoor fan 126, paragraph 0362) in concert with a controller (a control circuit 220 that controls the operation of the air conditioning apparatus, paragraph 0052 and as shown on figure 38) of said chilled beam unit turns on said fan (as described in paragraph 0349) when said temperature sensor (temperature sensor 233) determines said heat exchanger (indoor heat exchanger 125) is below a predetermined temperature (temperature sensor 233 detects that the temperature of the indoor heat exchanger 125 has reached a predetermined temperature, paragraph 0362, therefore interpreted as below a predetermined temperature due to the indoor fan 126 starting when the temperature sensor of the indoor heat exchanger has reached a predetermined temperature). Therefore, it would have been obvious to a person skilled in the art before the effective filing date of the invention to modify the unit in the combined teachings to include wherein: said temperature sensor in concert with a controller of said chilled beam unit turns on said fan when said temperature sensor determines said heat exchanger is below a predetermined temperature in view of the teachings of Takeda in order to yield the predictable results of allowing the air that has been subject to heat exchange with the indoor heat exchanger by the indoor fan. The combined teachings teach the invention as described above but fail to teach wherein: said temperature sensor selectively turns off said fan when said temperature sensor determines said heat exchanger is above a predetermined temperature. However, Kinoshita teaches wherein: said temperature sensor (indoor heat exchange temperature sensor 44, paragraph 0187) turns off said fan (indoor fan 42 is not started, paragraph 0187) when said temperature sensor (indoor heat exchange temperature sensor 44, paragraph 0187) determines said heat exchanger (indoor heat exchanger, paragraph 0187) is above a predetermined temperature (interpreted as the indoor fan 42 not starting due to the temperature not reaching a predetermined temperature, therefore above a predetermined temperature). Therefore, it would have been obvious to a person skilled in the art before the effective filing date of the invention to modify the unit in the combined teachings to include wherein: said temperature sensor selectively turns off said fan when said temperature sensor determines said heat exchanger is above a predetermined temperature in view of the teachings of Kinoshita in order to yield the predictable results of initiating a moderate-temperature air discharge control. Claim 12 is rejected under 35 U.S.C. 103 as being unpatentable over Li as modified by Broach and Nilsson as applied to claim 11 above, and further in view of Watanabe (JP 2008265583 A). Regarding claim 12, the combined teachings teach the invention as described above but fail to teach further comprising the steps of: powering said fan with a 12-volt supply of electricity. However, Watanabe teaches further comprising the steps of: powering said fan (voltage applied to each blower, paragraph 0027) and with a 12-volt supply of electricity (a power supply system connected via a transformer 50 that converts the generated 100V voltage to a low voltage of 12V, and a low voltage of 12V is applied to each blower, paragraph 0027). Therefore, it would have been obvious to a person skilled in the art before the effective filing date of the invention to modify the unit in the combined teachings to include further comprising the steps of: powering said fan with a 12-volt supply of electricity in view of the teachings of Watanabe in order to yield the predictable results of allowing the blowers to be driven for a long time with relatively low output. Response to Arguments Applicant’s arguments with respect to claim(s) 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to DARIO DELEON whose telephone number is (571)272-8687. The examiner can normally be reached Monday-Friday 9:00am-5:00pm. 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, Jerry Daryl Fletcher can be reached at 571-270-5054. 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. /DARIO ANTONIO DELEON/Examiner, Art Unit 3763 /JERRY-DARYL FLETCHER/Supervisory Patent Examiner, Art Unit 3763
Read full office action

Prosecution Timeline

Show 1 earlier event
Feb 13, 2025
Non-Final Rejection mailed — §103
May 13, 2025
Response Filed
Jul 29, 2025
Non-Final Rejection mailed — §103
Oct 29, 2025
Response Filed
Feb 11, 2026
Final Rejection mailed — §103
May 11, 2026
Request for Continued Examination
May 15, 2026
Response after Non-Final Action
Jun 01, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12680745
REFRIGERATOR
3y 2m to grant Granted Jul 14, 2026
Patent 12663195
QUICK FREEZE PALLET RACKS WITH VARIABLE LOUVERED DOORS
3y 1m to grant Granted Jun 23, 2026
Patent 12663194
ICE MAKER AND CONTROL METHOD THEREFOR
2y 6m to grant Granted Jun 23, 2026
Patent 12663168
DEHUMIDIFIER
2y 3m to grant Granted Jun 23, 2026
Patent 12663193
ICE MAKING ASSEMBLY FOR A REFRIGERATOR APPLIANCE
2y 0m to grant Granted Jun 23, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

4-5
Expected OA Rounds
63%
Grant Probability
97%
With Interview (+34.1%)
2y 8m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 199 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month