Prosecution Insights
Last updated: April 19, 2026
Application No. 17/990,470

FLUID HEATING APPARATUS

Non-Final OA §112
Filed
Nov 18, 2022
Examiner
BARGERO, JOHN E
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Kyungdong Navien Co. Ltd.
OA Round
3 (Non-Final)
56%
Grant Probability
Moderate
3-4
OA Rounds
3y 10m
To Grant
86%
With Interview

Examiner Intelligence

Grants 56% of resolved cases
56%
Career Allow Rate
322 granted / 579 resolved
-14.4% vs TC avg
Strong +31% interview lift
Without
With
+30.8%
Interview Lift
resolved cases with interview
Typical timeline
3y 10m
Avg Prosecution
36 currently pending
Career history
615
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
59.2%
+19.2% vs TC avg
§102
21.9%
-18.1% vs TC avg
§112
16.1%
-23.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 579 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 . 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and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114.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 6/27/2025 has been entered. Response to Arguments Applicant’s arguments with respect to the amended claims filed 6/27/2025 have been considered and are persuasive. Therefore, the rejection has been withdrawn. However, upon further consideration, new grounds of rejection are made below: Specification The disclosure is objected to because of the following informalities: The specification has used the term, “lead pipe” (40) which the Office thinks is a translation error because it has been found that lead pipes can introduce lead into the water supply which would be undesirable and most likely lead to a product recall once discovered due to the obvious detrimental health implications of lead contamination. Appropriate correction is required. 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. Claims1,3-6,8, and 13 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. Independent claims 1 and 13 state the condition, “when a set temperature of the fluid heating apparatus is greater than or equal to a reference temperature...”. This is unclear as to what is the temperature of the “fluid heating apparatus” because three temperatures are recorded by sensors (104,106,107) which are all part of the fluid heating apparatus (100) and there may be variation within the system and so the Office is unsure of what is meant by this set temperature. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JOHN E BARGERO whose telephone number is (571) 270-1770. The examiner can normally be reached Monday-Friday. 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, Steve McAllister can be reached at (571) 272-6785. 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. /JOHN E BARGERO/Examiner, Art Unit 3762 /STEVEN B MCALLISTER/Supervisory Patent Examiner, Art Unit 3762
Read full office action

Prosecution Timeline

Nov 18, 2022
Application Filed
Sep 27, 2024
Non-Final Rejection — §112
Dec 27, 2024
Response Filed
Mar 14, 2025
Final Rejection — §112
May 23, 2025
Response after Non-Final Action
Jun 27, 2025
Request for Continued Examination
Jul 01, 2025
Response after Non-Final Action
Dec 27, 2025
Non-Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12595915
GAS VALVE AND OVEN
2y 5m to grant Granted Apr 07, 2026
Patent 12594817
FLUID-HEATING DEVICE, IN PARTICULAR FOR A VEHICLE
2y 5m to grant Granted Apr 07, 2026
Patent 12590710
LINKED HOT WATER SUPPLY SYSTEM
2y 5m to grant Granted Mar 31, 2026
Patent 12584691
FURNACE SYSTEM AND METHOD OF USE
2y 5m to grant Granted Mar 24, 2026
Patent 12584656
WATER HEATER ASSEMBLY FOR A RECREATION VEHICLE AND METHOD FOR OPERATION
2y 5m to grant Granted Mar 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
56%
Grant Probability
86%
With Interview (+30.8%)
3y 10m
Median Time to Grant
High
PTA Risk
Based on 579 resolved cases by this examiner. Grant probability derived from career allow rate.

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