Prosecution Insights
Last updated: October 04, 2026
Application No. 18/802,546

EXPLOSION-DRIVEN MULTI-BREAK CIRCUIT BREAKER

Non-Final OA §102
Filed
Aug 13, 2024
Priority
Nov 14, 2023 — CN 202311511788.8
Examiner
BOLTON, WILLIAM A
Art Unit
Tech Center
Assignee
Hefei Institutes Of Physical Science Cas
OA Round
1 (Non-Final)
89%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
95%
With Interview

Examiner Intelligence

Grants 89% — above average
89%
Career Allowance Rate
691 granted / 774 resolved
+29.3% vs TC avg
Moderate +6% lift
Without
With
+5.7%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 10m
Avg Prosecution
28 currently pending
Career history
786
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
54.9%
+14.9% vs TC avg
§102
30.1%
-9.9% vs TC avg
§112
10.5%
-29.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 774 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 . 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 1-6 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Fu et al, CN107993889 [Fu]. Regarding claim 1, Fu discloses (figs.1-4) an explosion-driven multi-break circuit breaker (1), comprising: conductive plates (labeled in fig.3a); a detonating cord [see fig.2]; an explosive column (4); a conductive cylinder (3); fracture zones (labeled in fig.3a); an explosion chamber (labeled in fig.3a); blocking rings (6); and epoxy supporting rods [see fig.2], where the explosive column (4) is arranged in the explosion chamber(labeled in fig.3a), and the explosion chamber (labeled in fig.3a) is filled with deionized water (5), where the explosive column (4) is filled with high explosives, and a detonator is arranged at an upper portion of the explosive column (4), and the explosive column (4) and the detonator are detonatable by the detonating cord, where the conductive plates(labeled in fig.3a) are composed of an upper conductive plate (labeled in fig.3a) and a lower conductive plate (labeled in fig.3a) which are arranged at an outermost side of the circuit breaker (1) in parallel, and wherein both ends of the conductive cylinder (3) are tightly connected to the conductive plates (labeled in fig.3a), and each of the blocking rings (6) arranged at a periphery of the conductive cylinder (3) is of a multi-break annular structure and fixed between the upper conductive plate (labeled in fig.3a) and the lower conductive plate (labeled in fig.3a) by the epoxy supporting rods [see fig.2]. PNG media_image1.png 368 466 media_image1.png Greyscale Regarding 2, Fu further discloses where the conductive cylinder (3) is a thin-wall cylinder made of high conductivity material, a plurality of annular grooves are precut on in outer surface of the conductive cylinder (3) as fracture zones (labeled in fig.3a, above), and both ends of the conductive cylinder (3) are connected to the conductive plates (labeled in fig.3a, above); and a plurality of blocking rings (6) are installed on the periphery of the conductive cylinder (3), fixed by the epoxy supporting rods [see fig.2] at positions correspond to positions of the fracture zones (labeled in fig.3a, above) of the conductive cylinder (3). Regarding claim 3, Fu further discloses where the explosion chamber (labeled in fig.3a, above) is an internal space enclosed by the upper conductive plate (labeled in fig.3a, above), the lower conductive plate (labeled in fig.3a, above) and the conductive cylinder (3); when the explosives are detonated, detonation waves are transmitted through the deionized water (5), so that the fracture zones (labeled in fig.3a, above) of the conductive cylinder (3) are fractured simultaneously; and when electric arcs occur at resultant breaks, the electric arcs at the breaks are extinguished by a high-flow deionized water (5) driven by denotation waves, so that voltage insulation is achieved. Regarding claim 4, Fu further discloses where each of the blocking rings (6) is of an annular insulating structure with high strength, made of fiberglass epoxy material, and cooperatively installed at the periphery of the conductive cylinder (3); the blocking rings (6) are fixed between the upper conductive plate (labeled in fig.3a, above) and the lower conductive plate (labeled in fig.3a, above) by the epoxy supporting rods [see fig.2]; and when the explosives are detonated, the conductive cylinder (3) is evenly fractured from the fracture zones (labeled in fig.3a, above) and turned outwards to be attached to surfaces of the blocking rings (6), so as to form a plurality of switching breaks, and level of the breaking voltage is adjusted by adjusting a number of the breaks. Regarding claim 5, Fu further discloses where the explosives are installed along an axial direction of the conductive cylinder (3). Regarding claim 6, Fu further discloses where a main current path of the circuit breaker (1) is formed by the conductive plates (labeled in fig.3a, above) and the conductive cylinder (3) together, without affecting an overall through-current, a current density of the conductive plates (labeled in fig.3a, above) is reduced, a heating situation of the circuit breaker (1) during steady through-current is capable of being reduced, and the circuit breaker (1) is protected. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Burkett et al, Channakesavelu et al, To et al, Masumoto, Tazarine et al, Yamamoto et al and Sprenger et al are examples of explosion switches configured similar to the present invention. Any inquiry concerning this communication or earlier communications from the examiner should be directed to WILLIAM A BOLTON whose telephone number is (571)270-5887. The examiner can normally be reached Mon-Fri: 7:30AM - 5:00PM. 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, Renee S Luebke can be reached at 571-272-2009. 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. /WILLIAM A BOLTON/Primary Examiner, Art Unit 2831
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Prosecution Timeline

Aug 13, 2024
Application Filed
Sep 10, 2026
Non-Final Rejection mailed — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12749637
OVERMOLDED ELECTRICAL DEVICE WITH LOW ELECTRICAL STRESS PARTING LINES
2y 8m to grant Granted Sep 29, 2026
Patent 12749638
SF6 FREE GAS INSULATED DISCONNECTOR WITH LIMITED ARCING VOLUME
2y 8m to grant Granted Sep 29, 2026
Patent 12744172
VACUUM SWITCHING UNIT AND VACUUM CIRCUIT BREAKER
2y 8m to grant Granted Sep 22, 2026
Patent 12744167
ARC ELIMINATION DEVICE
2y 8m to grant Granted Sep 22, 2026
Patent 12744366
TANK-TYPE CIRCUIT BREAKER
2y 7m to grant Granted Sep 22, 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
89%
Grant Probability
95%
With Interview (+5.7%)
1y 10m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 774 resolved cases by this examiner. Grant probability derived from career allowance rate.

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