Prosecution Insights
Last updated: April 19, 2026
Application No. 18/454,496

OUTDOOR HEAT PRESERVATION DINING STOVE

Non-Final OA §102§112
Filed
Aug 23, 2023
Examiner
SHIRSAT, VIVEK K
Art Unit
3762
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Sunnex Products (Guangdong) Limited
OA Round
1 (Non-Final)
74%
Grant Probability
Favorable
1-2
OA Rounds
3y 0m
To Grant
99%
With Interview

Examiner Intelligence

Grants 74% — above average
74%
Career Allow Rate
781 granted / 1061 resolved
+3.6% vs TC avg
Strong +28% interview lift
Without
With
+28.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
60 currently pending
Career history
1121
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
45.7%
+5.7% vs TC avg
§102
25.2%
-14.8% vs TC avg
§112
23.3%
-16.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1061 resolved cases

Office Action

§102 §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 1-9 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. Claim 1 recites the limitation "the top of the base" in line 2. There is insufficient antecedent basis for this limitation in the claim. Claim 1 recites the limitation "the inner side" in line 5. There is insufficient antecedent basis for this limitation in the claim. Claim 3 recites the limitation "the joining area" in line 4. There is insufficient antecedent basis for this limitation in the claim. Claim 4 recites the limitation "the outer edge" and “the top of the plate” in line 2. There is insufficient antecedent basis for this limitation in the claim. Claim Rejections - 35 USC § 102 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 and 8-9 is/are rejected under 35 U.S.C. 102(a)(1) as being Glaessner by (US 725,335). With respect to claim 1 Glaessner discloses a outdoor heat preservation dining stove, wherein the heat preservation dining stove comprises a base [reference characters 2 and 5] and a plate [reference character 9]; the top of the base [reference character 5] is recessed inwardly to form in turn a holding cavity and a water storage cavity [see annotated Fig. below] which are connected; the water storage cavity is used for storing hot water [pp. 1 lines 40-42]; the plate is placed in the holding cavity with its bottom contacting the hot water in the water storage cavity [pp. 1 lines 40-42 and annotated Fig. below]; the inner side of the base is provided with an overflow groove [see annotated Fig. below], located at the interface between the holding cavity and the water storage cavity, to receive the hot water overflowing from the water storage cavity1. PNG media_image1.png 464 704 media_image1.png Greyscale With respect to claim 2 Glaessner discloses that the recessed direction of the overflow groove is the same as that of the water storage cavity [see annotated Fig. below]. With respect to claim 8 Glaessner disclose that the top of the base is provided with a lifting slot [see annotated Fig. below] to facilitate to remove the plate from the base. PNG media_image2.png 286 628 media_image2.png Greyscale With respect to claim 9 Glaessner discloses that the outside of the base is further provided with a recess with a regular or irregular shape [see annotated Fig. below], which is convenient for lifting the base for moving. PNG media_image3.png 284 432 media_image3.png Greyscale Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to VIVEK K SHIRSAT whose telephone number is (571)272-3722. The examiner can normally be reached M-F 9:00AM-5:20AM. 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, Steven B 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. /VIVEK K SHIRSAT/Primary Examiner, Art Unit 3762 1 Note that a person having ordinary skill in the art would recognize that the identified channel would capture any overflowing water.
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Prosecution Timeline

Aug 23, 2023
Application Filed
Nov 05, 2025
Non-Final Rejection — §102, §112 (current)

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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
74%
Grant Probability
99%
With Interview (+28.5%)
3y 0m
Median Time to Grant
Low
PTA Risk
Based on 1061 resolved cases by this examiner. Grant probability derived from career allow rate.

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