Prosecution Insights
Last updated: April 19, 2026
Application No. 18/399,762

CONSTANT-POWER PURE SINE WAVE OUTPUT CIRCUIT, DEVICE AND POWER SUPPLY SYSTEM

Non-Final OA §103§112
Filed
Dec 29, 2023
Examiner
MEHARI, YEMANE
Art Unit
2838
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Shenzhen Billda Technology Co. Ltd.
OA Round
1 (Non-Final)
89%
Grant Probability
Favorable
1-2
OA Rounds
2y 4m
To Grant
96%
With Interview

Examiner Intelligence

Grants 89% — above average
89%
Career Allow Rate
813 granted / 909 resolved
+21.4% vs TC avg
Moderate +6% lift
Without
With
+6.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
20 currently pending
Career history
929
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
54.1%
+14.1% vs TC avg
§102
36.4%
-3.6% vs TC avg
§112
4.3%
-35.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 909 resolved cases

Office Action

§103 §112
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 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. This office action is in response to the application filed on 12/29/2023. Drawings The drawings submitted on 12/29/2023 are acceptable. Claims 1-8 are pending and have been examined. Claim Rejections - 35 USC § 103 The following is a quotation of 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102 of this title, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. Claims 1 and 7-8 are rejected under 35 U.S.C. 103 as being unpatentable over Zhu et al. (US 2017/0338735 A1), hereinafter ‘Zhu in view of Glovinsky et al. (US 20180278177 A1), hereinafter ‘Glovinsky. In re to claim 1, Zhu disclose a constant-power pure sine wave output circuit (i.e. the charge control circuit AC power source, AC power source from a grid is a pure sine wave signal, see fig. 1 and ps. [0029-0030]) comprising: an AC-DC module (i.e. 12); a charging module (i.e. 100); a DC-DC boost module (i.e. 44); and an MCU module (i.e. 30, see p. [0034]); wherein the AC-DC module (i.e. 12) is electrically connected to the DC-DC boost module (i.e. 44, see p. [0036], all of the elements in the circuit are electrically connected),) through the charging module (i.e. 100); and the MCU module (i.e. 30) is electrically connected to the AC-DC module (i.e. 12), the charging module (i.e. 100), and the DC-DC boost module (i.e. 44); wherein when a first DC voltage output by the AC-DC module (i.e. 12) is turned off or lower than a preset DC threshold, the MCU module (i.e. 30) is configured to control the charging module to transmit a second DC voltage to the DC-DC boost module (i.e. 44, see ps. [0031-0034 and 0037-0039]). Except, Zhu fail to explicitly disclose that the DC-DC boost module is connected to the DC-AC output module. Whereas, Glovinsky teach that the DC-DC boost module (i.e. 804. Fig. 8a) is connected to the DC-AC output module (i.e. 803. Fig. 8a, see p. [0093]). Therefore, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to have modified the power converter output circuit of Zhu by integrating the DC-AC converter circuit of Glovinsky to be able to supply an AC power source to a load or a device. In re to claim 7, Zhu disclose a constant-power pure sine wave output device (i.e. the charge control circuit AC power source, AC power source from a grid is a pure sine wave, see fig. 1 and ps. [0029-0030]), comprising: a housing; and the constant-power pure sine wave output circuit of claim 1, wherein the constant-power pure sine wave output circuit is arranged in the housing (i.e. see ps. [0023, 0051]). In re to claim 8, Zhu disclose a power supply system (i.e. fig. 1, see p. [0053]), comprising: a mains power supply device (i.e. the AC power supply to the 100, fig. 1); and the constant-power pure sine wave output device (i.e. 100) of claim 7; wherein the mains power supply device is configured to transmit a mains AC signal (i.e. the AC power supply to 100, fig. 1) to the constant-power pure sine wave output device (i.e. . the charge control circuit AC power source, AC power source from a grid is a pure sine wave signal, see fig. 1 and ps. [0029-0030]) fig. 1). Allowable Subject Matter Claims 2-6 are objected to as being dependent upon a rejected base claims but would be allowable if rewritten in independent form including all the limitations of the base claim and any intervening claims and the rejection under 35 U.S.C. 112(b) for claims 1-20 is overcome by amending the claims. The following is a statement of reasons for the indication of allowable subject matter: In re to claim 2, None of the cited prior art alone or in combination disclose or teach the claimed inventions in which “a switching component linked with a relay JD1, wherein the switching component is configured to turn on or off a contact of a lighting or other load in the presence or absence of mains power”. In re to claim 6, None of the cited prior art alone or in combination disclose or teach the claimed inventions in which “a dimming circuit, wherein the dimming circuit comprises a connector J5, a resistor R75, a resistor R76, a resistor R77, and a second voltage regulator ZD2”. The art of record does not disclose the above limitations, nor would it be obvious to modify the art of record to include either of the above limitations. In re to claims 3-5, claims 3-5 depend on claim 2, thus are also objected for the same reasons provided above. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure, Liang (US 9,941,234 B2) discloses a semiconductor power module comprising power switches, first and second metal structures, first and second transistors and a controller. However, Liang do not teach or fairly suggest that “a second opening through the first case for exposing the second surface of the second metal structure; wherein the second terminal of the first transistor is sintered to the first surface of the first metal element, wherein the second terminal of the second transistor is sintered to the first surface of the second metal element; a third opening through the first case for exposing the second surface of the first metal element; a fourth opening through the first case for exposing the second surface of the second metal element”. Remarks The Office has cited columns, line numbers, paragraph numbers, references, or figures in the references applied to the claims below for the convenience of the applicant. Although the specified citations are representative of the teachings of the art and are applied to specific limitations within the individual claim, other passages and figures may apply as well. It is respectfully requested from the applicant in preparing responses to fully consider the reference in entirety, as potentially teaching all or part of the claimed invention. See MPEP § 2141.02 and § 2123. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to YEMANE MEHARI whose telephone number is (571)270-7603. The examiner can normally be reached M-F 9AM TO 6 PM. 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, Thienvu V. Tran can be reached on 5712701276. 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. /YEMANE MEHARI/Primary Examiner, Art Unit 2838
Read full office action

Prosecution Timeline

Dec 29, 2023
Application Filed
Nov 15, 2025
Non-Final Rejection — §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12603580
POWER CONVERSION APPARATUS AND POWER CONVERSION SYSTEM
2y 5m to grant Granted Apr 14, 2026
Patent 12597851
DISTRIBUTED CONTROL DEVICE AND DISTRIBUTED CONTROL SYSTEM
2y 5m to grant Granted Apr 07, 2026
Patent 12587089
FREQUENCY TUNED RESISTOR-INDUCTOR-CAPACITOR SNUBBER FOR SWITCHING POWER SUPPLY
2y 5m to grant Granted Mar 24, 2026
Patent 12573951
ELECTRONIC DEVICE COMPRISING BOOST CIRCUIT, AND METHOD FOR CONTROLLING SAME ELECTRONIC DEVICE
2y 5m to grant Granted Mar 10, 2026
Patent 12562639
POWER ELECTRONICS CONVERTER THERMAL MANAGEMENT
2y 5m to grant Granted Feb 24, 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
96%
With Interview (+6.2%)
2y 4m
Median Time to Grant
Low
PTA Risk
Based on 909 resolved cases by this examiner. Grant probability derived from career allow rate.

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