Prosecution Insights
Last updated: April 19, 2026
Application No. 18/748,338

REFRIGERATION SYSTEM WITH HEAT RECOVERY

Non-Final OA §112
Filed
Jun 20, 2024
Examiner
BRADFORD, JONATHAN
Art Unit
3763
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Danfoss A/S
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
2y 9m
To Grant
97%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
880 granted / 1159 resolved
+5.9% vs TC avg
Strong +21% interview lift
Without
With
+21.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 9m
Avg Prosecution
26 currently pending
Career history
1185
Total Applications
across all art units

Statute-Specific Performance

§101
1.2%
-38.8% vs TC avg
§103
48.5%
+8.5% vs TC avg
§102
19.3%
-20.7% vs TC avg
§112
25.3%
-14.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1159 resolved cases

Office Action

§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 . Claim Rejections - 35 USC § 112 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 1-19 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 applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Regarding claims 1 and 14, the term “hot fluid” in each claim is a relative term which renders the claims indefinite. The term “hot fluid” is not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. Specifically, one of ordinary skill in the art would not reasonably recognize what fluid temperature level would or would not be considered to be “hot”. For examination purposes the claim is presumed to describe rejecting heat from the heat exchanger to a fluid circuit as appears to be shown in Fig. 1. Regarding claims 2-13 and 15-19, the claims are rejected due to dependence from rejected claims. Further regarding claims 4, 6, and 7, the terms “medium temperature” and “low temperature” in each claim are relative terms which render the claims indefinite. The terms “medium temperature” and “low temperature” are not defined by the claim, the specification does not provide a standard for ascertaining the requisite degree, and one of ordinary skill in the art would not be reasonably apprised of the scope of the invention. Specifically, one of ordinary skill in the art would not reasonably recognize what temperature level would or would not be considered to be “medium” or “low”. For examination purposes the claim is presumed to describe the configuration shown in Fig. 1 where it appears as though evaporator 30B and 18B operate to provide relatively cooler temperatures than evaporator 30A and compressor(s) 18A. Examiner Note Claims 1-19 are considered to read over the prior art of record because the prior art of record does not teach or suggest the claimed combination of features including a heat recovery system having a gas cooler with first and second refrigerant paths that transfer heat between each other. For example, US 10,502,461 (see Fig. 3A) and US 5,826,433 (see Fig. 1) each teach similar systems to that as claimed, wherein one or more valves are utilized to control flow through heat reclaim exchangers and a gas cooler. However, there is nothing in the prior art of record that would, reasonably and absent impermissible hindsight, lead one of ordinary skill in the art to modify the references to utilize a gas cooler with first and second flow paths configured in the specific manner as required by the claims. However, these claims cannot be considered to be "allowable” at this time due to the rejection(s) under 35 U.S.C. 112 set forth in this Office Action. Therefore, upon the claims being rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112 set forth in this Office Action, further consideration of these claims with respect to the prior art will be necessary. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JONATHAN BRADFORD whose telephone number is (571)270-5199. The examiner can normally be reached Monday-Friday 8:00 - 4:00 ET. 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. /JONATHAN BRADFORD/ Primary Examiner, Art Unit 3763
Read full office action

Prosecution Timeline

Jun 20, 2024
Application Filed
Jan 06, 2026
Non-Final Rejection — §112
Mar 30, 2026
Response Filed

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12601535
Glass Heat Zone Control
2y 5m to grant Granted Apr 14, 2026
Patent 12595949
REFRIGERATOR
2y 5m to grant Granted Apr 07, 2026
Patent 12595947
SYSTEM AND METHOD OF MONITOR QUALITY OF A REFRIGERANT IN A COOLING SYSTEM
2y 5m to grant Granted Apr 07, 2026
Patent 12590744
REDUCTION OF POWER CONSUMPTION IN TRANSPORT REFRIGERATION UNIT
2y 5m to grant Granted Mar 31, 2026
Patent 12590722
System and Method for Detecting a Refrigerant Leak in an HVAC System Operating in an Idle Mode
2y 5m to grant Granted Mar 31, 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
76%
Grant Probability
97%
With Interview (+21.3%)
2y 9m
Median Time to Grant
Low
PTA Risk
Based on 1159 resolved cases by this examiner. Grant probability derived from career allow rate.

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