Prosecution Insights
Last updated: April 19, 2026
Application No. 19/069,646

HEAT AND POWER COGENERATION SYSTEM

Non-Final OA §102
Filed
Mar 04, 2025
Examiner
NGUYEN, HOANG M
Art Unit
3746
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Practical Solutions LLC
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
2y 7m
To Grant
92%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allow Rate
1292 granted / 1708 resolved
+5.6% vs TC avg
Strong +16% interview lift
Without
With
+16.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
25 currently pending
Career history
1733
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
57.5%
+17.5% vs TC avg
§102
10.0%
-30.0% vs TC avg
§112
8.6%
-31.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1708 resolved cases

Office Action

§102
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 . 35 USC 102 rejections 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. Claim(s) 1-2 is/are rejected under 35 U.S.C. 102(a1) as being anticipated by US 2012/0102996 (Freund). Regarding Claim 2, Freund teaches a refrigeration system (power generation system 100; Abstract; Fig. 1) comprising: a refrigerant evaporator (condenser 136; Para. [0034]; Fig. 1) configured to extract heat from a cogeneration system (first loop 102; Fig. 1) using a Rankine cycle to pump working fluid (using pump 110; Para. [0020], [0030], [0032]; Fig. 1); and a refrigerant condenser (150; Para. [0036]; Fig. 1) operatively coupled to the cogeneration system (via desorber 128 and line with vaporized refrigerant 154 as shown in Fig. 1; Para. [0036]). Regarding Claim 2, Freund teaches the refrigeration system of claim 1, and Freund teaches of wherein the working fluid is carbon dioxide (Para. [0030]). Prior Art of Record The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. McKenzie, Shirk, McWhirter, Lehar, and Kido disclose cogeneration systems in combination with refrigeration systems. Conclusions Any inquiry concerning this communication or earlier communications from the Examiner should be directed to Examiner Nguyen whose telephone number is (571) 272-4861. The examiner can normally be reached on Monday--Thursday from 9:00 AM to 7:00 PM. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Mark Laurenzi, can be reached on (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 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). /HOANG M NGUYEN/Primary Examiner, Art Unit 3746 HOANG NGUYEN PRIMARY EXAMINER ART UNIT 3746 Hoang Minh Nguyen 2/9/2026
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Prosecution Timeline

Mar 04, 2025
Application Filed
Jan 28, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12590679
SYSTEM FOR CIRCULATING A LIQUID
2y 5m to grant Granted Mar 31, 2026
Patent 12590736
SYSTEM FOR RESTORATION OF A SALTY BODY OF WATER THAT HARNESSES HYDRO, SOLAR, AND GEOTHERMAL ENERGY, TO BE USED IN REMOTE LOCATIONS AND DIFFERENT APPLICATIONS INCLUDING THE PRODUCTION OF DISTILLED WATER FROM A SALTY BODY OF WATER
2y 5m to grant Granted Mar 31, 2026
Patent 12590550
APPARATUS FOR ENERGY CONVERSION
2y 5m to grant Granted Mar 31, 2026
Patent 12583596
AIRCRAFT PROPULSION SYSTEM
2y 5m to grant Granted Mar 24, 2026
Patent 12577934
HYDRAULIC DEVICE FOR A PITCH SYSTEM, A PITCH SYSTEM AND WIND TURBINE
2y 5m to grant Granted Mar 17, 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
92%
With Interview (+16.4%)
2y 7m
Median Time to Grant
Low
PTA Risk
Based on 1708 resolved cases by this examiner. Grant probability derived from career allow rate.

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