Prosecution Insights
Last updated: April 19, 2026
Application No. 18/245,775

APPLIANCE COUPLER WATER PUMPING APPARATUS

Non-Final OA §102
Filed
Mar 17, 2023
Examiner
KEASEL, ERIC S
Art Unit
3753
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
BEIJING LEFT TREE TECHNOLOGY CO., LTD.
OA Round
1 (Non-Final)
79%
Grant Probability
Favorable
1-2
OA Rounds
2y 7m
To Grant
94%
With Interview

Examiner Intelligence

Grants 79% — above average
79%
Career Allow Rate
456 granted / 574 resolved
+9.4% vs TC avg
Moderate +15% lift
Without
With
+14.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
11 currently pending
Career history
585
Total Applications
across all art units

Statute-Specific Performance

§101
0.6%
-39.4% vs TC avg
§103
33.4%
-6.6% vs TC avg
§102
27.2%
-12.8% vs TC avg
§112
32.1%
-7.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 574 resolved cases

Office Action

§102
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 . In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. Claim Objections Claims 7 and 8 are objected to because of the following informalities: In claim 7, line 8, “anaxial” should be --an axial--. In claim 8, line 4, “forma” should be --form a--. Appropriate correction is required. 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. Claims 1-3 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Tan et alia (CN110934492(A)), hereinafter “Tan”. Re claim 1, Tan discloses an appliance coupler water pumping apparatus, used for a liquid heater (kettle) having a detachable inner container, a bottom of the inner container is provided with a first through hole (where the top of 2 extends through the bottom on the kettle’s inner container as shown in Fig. 3), wherein the appliance coupler water pumping apparatus comprises a water inlet pipe assembly (including top inlet pipe 21 leading into the container, see paragraph [0088]) and a water pumping pipe assembly (the pump leads to pipe 51, see paragraph [0107]), the water inlet pipe assembly is communicated with an inner portion of the inner container through the first through hole (see Fig. 3); the water pumping pipe assembly is used to match with the water inlet pipe assembly and extract the liquid in the inner container when it is communicated with the water inlet pipe assembly (see Fig. 3 and compare applicant’s Fig. 2 with Fig. 3 in Tan). PNG media_image1.png 384 576 media_image1.png Greyscale PNG media_image2.png 500 568 media_image2.png Greyscale Re claim 2, Tan discloses the appliance coupler pumping apparatus according to claim 1, wherein the water inlet pipe assembly comprises a water inlet pipe (21 and the structure surrounding 241, 24, 26, 28, and 29) and a water sealing sliding block (241, 24); an end of the water inlet pipe facing the inner container is communicated with the inner portion of the inner container; the water sealing sliding block is slidably arranged in the water inlet pipe to seal an end of the water inlet pipe away from the inner container (see Figs. 3 and 5 and paragraphs [0090] and [0091]). Re claim 3, Tan discloses the appliance coupler pumping apparatus according to claim 2, wherein the water inlet pipe assembly further comprises a first sealing sleeve (26, 28), the first sealing sleeve is arranged at the end of the water inlet pipe away from the inner container (see Figs. 3 and 5), and the first sealing sleeve is embedded in the water inlet pipe; the first sealing sleeve is provided with a second through hole (leading to 51) along an axis of the water inlet pipe, and an end of the second through hole facing the water sealing sliding block forms a sealing groove matching with the water sealing sliding block (at the interface of 24 and 26). Allowable Subject Matter Claims 4-16 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: Re claim 4, Tan discloses the appliance coupler pumping apparatus according to claim 3. However, it would not have been obvious to modify Tan such that an end of the water sealing sliding block facing the first sealing sleeve is fixedly provided with a sealing ball; the sealing groove of the second through hole is a spherical surface groove matched with the spherical surface of the sealing ball. This describes the spherical surface at 611 and ref. no. 94 being fixedly attached to the ball (53) as shown in Fig. 3. PNG media_image3.png 242 452 media_image3.png Greyscale PNG media_image4.png 426 390 media_image4.png Greyscale Re claim 6, Tan discloses the appliance coupler pumping apparatus according to claim 2. However, it would not have been obvious to modify Tan such that an inner wall and an outer wall of the end of the water inlet pipe close to the inner container extend radially along the water inlet pipe to form a first supporting part and a second supporting part respectively; a spring is arranged between the first supporting part and the second supporting part; one end of the spring abuts against the first supporting part, and another end thereof abuts against the water sealing sliding block. This describes the location and placement of applicant’s upper spring (4). It would not have been obvious to relocate the spring of Tan to meet the claim language. PNG media_image5.png 332 494 media_image5.png Greyscale PNG media_image6.png 312 346 media_image6.png Greyscale Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Melzer and Liu disclose similar apparatus and valve placement. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Eric Keasel whose telephone number is (571) 272-4929. The examiner works a part-time schedule and can normally be reached on Monday, Tuesday, Thursday, and 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 supervisors, Kenneth Rinehart and Craig Schneider can be reached on 571-272-4881 and 571-272-3607, respectively. 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. /ERIC KEASEL/Primary Examiner, Art Unit 3753
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Prosecution Timeline

Mar 17, 2023
Application Filed
Mar 10, 2026
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12560251
VALVE SPRING HOLDER, VALVE BOX, AND PLUNGER PUMP
2y 5m to grant Granted Feb 24, 2026
Patent 12560257
Valve
2y 5m to grant Granted Feb 24, 2026
Patent 12535144
FLUID CONTROL VALVE MODULE
2y 5m to grant Granted Jan 27, 2026
Patent 12523211
OPTIMIZED VALVE SYSTEM FOR PISTON COMPRESSORS - VALVE LAMINA AND VALVE RETAINER HAVING AERODYNAMIC DAMPING
2y 5m to grant Granted Jan 13, 2026
Patent 12510183
HYDROGEN VALVE
2y 5m to grant Granted Dec 30, 2025
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
79%
Grant Probability
94%
With Interview (+14.8%)
2y 7m
Median Time to Grant
Low
PTA Risk
Based on 574 resolved cases by this examiner. Grant probability derived from career allow rate.

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