Prosecution Insights
Last updated: July 17, 2026
Application No. 18/690,606

HIGH-VOLTAGE DIRECT CURRENT (DC) RELAY CAPABLE OF ENHANCING ARC EXTINGUISHING CAPABILITY

Non-Final OA §102
Filed
Mar 08, 2024
Priority
Sep 10, 2021 — CN 202122196800.3 +1 more
Examiner
BOLTON, WILLIAM A
Art Unit
2831
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Xiamen Hongfa Electric Power Controls Co. Ltd.
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
679 granted / 762 resolved
+21.1% vs TC avg
Moderate +6% lift
Without
With
+5.8%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 10m
Avg Prosecution
24 currently pending
Career history
783
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
84.8%
+44.8% vs TC avg
§102
11.2%
-28.8% vs TC avg
§112
1.7%
-38.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 762 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 . Drawings The drawings are objected to under 37 CFR 1.83(a). The drawings must show every feature of the invention specified in the claims. Therefore, “wherein the two second permanent magnets are connected into one piece” of claim 8; and “an anti-short circuit structure is provided in a middle portion of the movable contact piece in a length direction” of claim 10; must be shown or the feature(s) canceled from the claim(s). No new matter should be entered. In addition, the Chinese characters should be removed from the drawings. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. The figure or figure number of an amended drawing should not be labeled as “amended.” If a drawing figure is to be canceled, the appropriate figure must be removed from the replacement sheet, and where necessary, the remaining figures must be renumbered and appropriate changes made to the brief description of the several views of the drawings for consistency. Additional replacement sheets may be necessary to show the renumbering of the remaining figures. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. Claim Objections Claims 4, 8-10 and 12-14 are objected to because: Claim 4, line 3, “a length direction” should be -the length direction-. Claim 8, line 2, phrase, “wherein the two second permanent magnets are connected into one piece” is unclear and leave doubts as to how this feature is achieved, because claim 8 depends upon claim 4 which recite that the two second permanent magnets are symmetrically arranged and therefore are two separate magnets. Claim 9, line 4, “the corresponding first permanent magnet” lacks antecedent basis. Claim 9, lines 4-5, “the corresponding movable contact” lacks antecedent basis. Claim 10, line 2, phrase, “an anti-short circuit structure” is unclear and leave doubts as to what technical feature is being referred to. Claim 10, line 3, “a length direction” should be -the length direction-. Claim 12, lines 12-13, “the U-shaped lower armature” lacks antecedent basis. Claim 13, line 3, “a length direction” should be -the length direction-. Claim 14, line 3, “a length direction” should be -the length direction-. 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 1-14 are rejected under 35 U.S.C. 102 (a)(1) as being anticipated by Zhong et al, WO2020094135 (with reference to the text of U.S. 11670472 for an English Translation)[Zhong]. Regarding claim 1, Zhong discloses (figs.1-15 and 30-32) a high-voltage DC relay for enhancing arc extinguishing capability, comprising: two static contact (11, 12) leading-out terminals; a movable contact piece (2) arranged under the two static contact (11, 12) leading-out terminals, and two ends of the movable contact piece (2) used as movable contacts (2) being respectively matched with bottom ends of the two static contact (11, 12) leading-out terminals used as static contacts; two first permanent magnets (71) respectively arranged at outer side of two ends of the movable contact piece (2) in a length direction, corresponding to a position where the movable contacts (2) are in contact with the static contacts (11, 12), and sides having polarity of the two first permanent magnets (71) respectively facing corresponding positions where the movable contacts (2) are in contact with the static contacts (11, 12); two second permanent magnets (61, 62) respectively arranged on the movable contact piece (2) between the two static contact (11, 12) leading-out terminals at positions where the movable contacts (2) are in contact with the static contacts (11, 12), and sides having polarity of the second permanent magnets (61, 62) facing the corresponding first permanent magnets (71), and polarities of the sides having polarity of the second permanent magnets (61, 62) is opposite to polarities of the sides of the first permanent magnets (71) facing the positions where the movable contacts (2) are in contact with the static contacts (11, 12). Regarding claim 2, Zhong further discloses where magnetic pole surfaces of the second permanent magnets (61, 62) are smaller than magnetic pole surfaces of the first permanent magnets (71). Regarding claim 3, Zhong further discloses where the movable contact piece (2) is in a middle portion of each of the first permanent magnets (71) in a height direction. Regarding claim 4, Zhong further discloses where the two second permanent magnets (61, 62) are symmetrically arranged on two sides of a center line (A) [labeled in Fig.6, below] of the movable contact piece (2) in a length direction. PNG media_image1.png 472 606 media_image1.png Greyscale Regarding claim 5, Zhong further discloses where the second permanent magnets (61, 62) are stuck and fixed on an upper surface or a lower surface of the movable contact piece (2). Regarding claim 6, Zhong further discloses where grooves (22) recessed downward are formed on an upper surface of the movable contact piece (2), or grooves (22) recessed upward are formed on a lower surface of the movable contact piece (2), and at least a portion of the second permanent magnets (61, 62) are embedded into the grooves (22) [see fig.16]. Regarding claim 7, Zhong further discloses where the two second permanent magnets (61, 62) are two separate parts, and there is a preset space between the two second permanent magnets (61, 62) [see fig.5]. Regarding claim 8, Zhong further discloses where the two second permanent magnets (61, 62) are connected into one piece. Regarding claim 9, Zhong further discloses where the high-voltage DC relay further comprises two first U-shaped yokes (72) respectively arranged on the two first permanent magnets (71), a bottom wall of each first U-shaped yoke (72) is contacted with one side of the corresponding first permanent magnet (71) facing away from the corresponding movable contact (2), and two side walls (721) of each first U-shaped yoke (72) are respectively arranged on two sides of the movable contact piece (2) in a width direction and are opposite to the corresponding movable contact (2) [see fig.31]. Regarding claim 10, as best understood, Zhong further discloses where an anti-short circuit structure (formed from 61, 62) is provided in a middle portion of the movable contact piece (2) in a length direction; the anti-short circuit structure (formed from 61, 62) is arranged in the preset space between two second permanent magnets (61, 62). Regarding claim 11, as best understood, Zhong further discloses where the anti-short circuit structure (61, 62) is an anti-short circuit ring. Regarding claim 12, as best understood, Zhong further discloses where the anti-short circuit ring is formed by matching two linear shape upper armatures (61) and two U-shaped lower armatures (62); a through hole (22) penetrating through a thickness of the movable contact piece (2) is arranged in the middle portion of the movable contact piece (2) in the length direction; the two upper armatures (61) are fixed on a top portion of a U-shaped bracket (32) of a pushing rod (34) of the high-voltage DC relay, the two U-shaped lower armatures (62) are respectively fixed to the movable contact piece (2), and side walls (622) of the two U-shaped lower armatures (62) pass through the through hole (22) of the movable contact piece (2), top ends of the two U-shaped lower armatures (62) are exposed out of an upper surface of the movable contact piece (2) and correspondingly matched with the two linear shape upper armatures (61); a circular magnetic field generated by the movable contact piece (2) being energized forms a closed magnetic circuit [see fig.9] within an annular component formed by the linear shape upper armature (61) and the U-shaped lower armature (62). Regarding claim 13, Zhong further discloses where the two second permanent magnets (61, 62) are symmetrically arranged on two sides of a center line (A) [labeled in Fig.6, above] of the movable contact piece (2) in a length direction. Regarding claim 14, Zhong further discloses where the two second permanent magnets (61, 62) are symmetrically arranged on two sides of a center line (A) [labeled in Fig.6, above] of the movable contact piece (2) in a length direction. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. Minowa et al, Shi et al, Tashima et al, Zhong et al, Yano et al, Kubono et al, Hsu et al and Imanishi et al are examples of high-voltage relays for enhancing arc extinguishing capability, 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

Mar 08, 2024
Application Filed
Apr 04, 2026
Non-Final Rejection (signed) — §102
May 07, 2026
Non-Final Rejection mailed — §102 (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
89%
Grant Probability
95%
With Interview (+5.8%)
1y 10m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 762 resolved cases by this examiner. Grant probability derived from career allowance rate.

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