Prosecution Insights
Last updated: April 19, 2026
Application No. 18/431,025

HIGH VOLTAGE DIRECT CURRENT POWERED AIRCRAFT APPLIANCES

Final Rejection §103
Filed
Feb 02, 2024
Examiner
BUKHARI, AQEEL H
Art Unit
2849
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
B/E Aerospace, Inc.
OA Round
2 (Final)
86%
Grant Probability
Favorable
3-4
OA Rounds
2y 7m
To Grant
99%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allow Rate
539 granted / 630 resolved
+17.6% vs TC avg
Strong +15% interview lift
Without
With
+15.3%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
38 currently pending
Career history
668
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
43.1%
+3.1% vs TC avg
§102
35.4%
-4.6% vs TC avg
§112
12.4%
-27.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 630 resolved cases

Office Action

§103
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 . Response to Arguments Applicant’s arguments with respect to claim(s) 1-14 have been considered but are moot because the new ground of rejection does not rely on any reference applied in the prior rejection of record for any teaching or matter specifically challenged in the argument. 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, 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. Claim(s) 1-4, 7-10 and 13 are rejected under 35 U.S.C. 103 as being unpatentable over Rydkin et al. (US 2020/0055366 A1) in view of Aronson et al. (20130033789 A1) Regarding claim 1, Rydkin teaches an appliance for an aircraft ( see TRU 12, 10, 14 para 0033-0035) not expressly teaching tan aircraft appliance; comprising: an input, wherein the appliance is configured to be powered by high voltage direct current (HVDC) power at the input (see 600 VDC, 420, 450, 460 fig.4 para 0040) a low voltage load path comprising at least one low voltage load and a DC/DC converter configured to convert HVDC power from the input to a low voltage DC output for use by low voltage loads (see 43, 48, 430, 480 fig.4 para 0038-0041); a high voltage load path comprising at least one high voltage load (see 12, and wherein the high voltage line path is configured to provide HVDC power via a HVDC power bus from the input to one or more high voltage loads for use by the one or more high voltage loads (see 42, 460 , fig.4 para 0040);; wherein the appliance does not include a transformer (see 401, fig.4 eliminating DC/AC para 0045). Rydkin doesn’t expressly teach an appliance for an aircraft. In an analogous art Aronson teaches an appliance for an aircraft (see 18, 20, 24 para 0012-0013 fig.1). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to apply the HVDC bus architecture of Rydkin to aircraft galley insert appliances as taught by Aronson in order to eliminate the DC-AC conversion stages within aircraft galley appliances thereby reducing weight improving efficiency and simplifying internal power conversion circuitry. Regarding claim 2, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches wherein the high voltage line path comprises: a sense/detect module configured to detect a fault in the appliance, and at least one safety relay configured to disconnect the HVDC input from the high voltage load(s) if a fault is detected by the sense/detect module (see 12, 14, 16, 24, 26, para 0012-0013, 0017) breaker performs relay disconnection upon detected condition.. Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to incorporate programable circuit breaker architect of Aronson into the HVDC nodular appliance architecture of Rydkin in ordered to provide aircraft compatible fault responsive power disconnection and appliance integration, thereby improving operational safety and achieving predictable protection of aircraft power feeders and load. Regarding claim 3, combination of Rydkin and Aronson teaches invention set forth above, Rydkin further teaches wherein the appliance is a Point of Use (POU) chiller (see 42, 44, 440, 441, 460 para 0038-0040) compressed based cooling appliance. Regarding claim 4, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches wherein the appliance is a galley insert (GAIN) (see 18, 20, 22, 24, para 0012-0014) Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to incorporate programable circuit breaker architect of Aronson into the HVDC nodular appliance architecture of Rydkin in ordered to provide aircraft compatible fault responsive power disconnection and appliance integration, thereby improving operational safety and achieving predictable protection of aircraft power feeders and load. Regarding claim 7, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches wherein the GAIN is a chiller (see 18, 20, 22, 24, para 0012-0014), and Rydkin further teaches wherein the high voltage load(s) comprises a compressor powered directly from the HVDC power bus, and configured to be commanded by a microcontroller (see 42, 44, 440, 441, 460 fig.4 para 00338-0040). Regarding claim 8, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches wherein the at least one safety relay comprises at least one safety relay located at the power bus (see fig.1 12-16, 24 para 0012-0013). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to incorporate programable circuit breaker architect of Aronson into the HVDC nodular appliance architecture of Rydkin in ordered to provide aircraft compatible fault responsive power disconnection and appliance integration, thereby improving operational safety and achieving predictable protection of aircraft power feeders and load. Regarding claim 9, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches wherein the at least one safety relay comprises at least one solid state relay (See 12, 14, 16, 26 24 fig,1 para 0012, 0017). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to incorporate programable circuit breaker architect of Aronson into the HVDC nodular appliance architecture of Rydkin in ordered to provide aircraft compatible fault responsive power disconnection and appliance integration, thereby improving operational safety and achieving predictable protection of aircraft power feeders and load. Regarding claim 10, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches wherein the at least one safety relay comprises at least one electromechanical relay (see fig.1 12-16, 24 para 0012). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to incorporate programable circuit breaker architect of Aronson into the HVDC nodular appliance architecture of Rydkin in ordered to provide aircraft compatible fault responsive power disconnection and appliance integration, thereby improving operational safety and achieving predictable protection of aircraft power feeders and load. Regarding claim 13, combination of Rydkin and Aronson teaches invention set forth above, Aronson further teaches an aircraft comprising; a HVDC power supply network, and at least one appliance as defined in claim 1. Claim(s) 11, 12 and 14 are rejected under 35 U.S.C. 103 as being unpatentable over Rydkin et al. (US 2020/0055366 A1) in view of Anghel et al. (US 2000800111421 A1) Regarding claim 11, Rydkin teaches, a modular system for use in an aircraft ( see TRU 12, 10, 14 para 0033-0035) not expressly teaching tan aircraft appliance; comprising; a low voltage control module configured to receive high voltage direct current, HVDC, at its input and control at least one low voltage DC load (see 41, 42, 43, 430, 431 fig.4 50, 42 fig.5 para 0038-0040) and at least one HVDC module configured to receive HVDC power at its input and provide power and control to a HVDC load (see 44, 440, 441, 460, 42fig.4 para 0038-0040); wherein the at least one HVDC module is operatively connected to and controlled by the low voltage control module (see 431, 441 fig.4 50 fig.5 para 0043-0044) wherein the appliance does not include a transformer (see 401, fig.4 eliminating DC/AC para 0045). Rydkin doesn’t expressly teach an appliance for an aircraft. In an analogous art Anghel teaches an appliance for an aircraft (see 18, 20, 24 para 0012-0013 fig.1). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to use modular scalable aircraft conversion architect of Anghel in the DC power bus system of Rydkin to implement the disclosed Dc voltage control units as modular aircraft power conversion modules thereby achieving scalable modular HVDC distribution with improved reliability and weight reduction in aircraft system. Regarding claim 12, the combination of Rydkin and Anghel teaches invention set forth above, Rydkin further teaches wherein the at least one HVDC module comprises one or more of; a heating module configured to power and control at least one HVDC heating element, a compressor module configured to power and control a compressor for a chiller a microwave module configured to power and control a microwave source (see 42, 43, 44, 48, 440, 441, 460 fig.4 para 0038-0040). Regarding claim 14, the combination of Rydkin and Anghel teaches invention set forth above, Anghel further teaches an aircraft comprising; a HVDC power supply network, and at least one modular system as defined in claim 11 (see 250, 255, 130(1-n) fig.3 para 0028-0031). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date of invention was claimed to implement the modular HVDC voltage control architecture of Rydkin within the aircraft modular power conversion system of Anghel in order to provide scalable modular HVDC load control within an aircraft morning, thereby improving system integration, redundancy and operation efficiency. Claim(s) 5 and 6 rejected under 35 U.S.C. 103 as being unpatentable over Rydkin et al. (US 2020/0055366 A1) in view of Aronson et al. (20130033789 A1) further in view Brouwer et al. (2015/0102663 A1). Regarding claim 5, combination of Rydkin and Aronson teaches invention set forth above, combination doesn’t expressly teach wherein the GAIN is an oven, and the one or more high voltage loads comprise a plurality of heating elements topologies connected in parallel to the HVDC power bus. In an analogous art Brouwer further teaches wherein the GAIN is an oven; and the one or more high voltage loads comprise a plurality of heating elements topologies McAvoy further teaches connected in parallel Shipley further teaches to the HVDC power bus (see 520 a-c fig.5 para 0049, 0062). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date to incorporate the distributed solid state switching architecture of Brouwer in the aircraft HVDC appliance architecture of Rydkin and Aronson in order to provide fault responsive load protection and distributed high voltage switching to improve aircraft power system safety and achieving predictable protection of individual heating elements. Regarding claim 6, combination of Rydkin, Aronson and Brouwer teaches invention set forth above, Brouwer further teaches wherein the at least one safety relay comprises at least one safety relay connected in series with each of the heating elements (see 520 a-c fig.5 para 0049, 0062). Therefore, it would have been obvious for one of the ordinary skilled in the art before the effective filing date to incorporate the distributed solid state switching architecture of Brouwer in the aircraft HVDC appliance architecture of Rydkin and Aronson in order to provide fault responsive load protection and distributed high voltage switching to improve aircraft power system safety and achieving predictable protection of individual heating elements. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Aqeel H Bukhari whose telephone number is (571)272-4382. The examiner can normally be reached M-F (9am to 5pm). 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, Rexford Barnie can be reached at 571-2727492. 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. /AQEEL H BUKHARI/Examiner, Art Unit 2836 /Menatoallah Youssef/SPE, Art Unit 2849
Read full office action

Prosecution Timeline

Feb 02, 2024
Application Filed
Aug 30, 2025
Non-Final Rejection — §103
Dec 01, 2025
Response Filed
Feb 17, 2026
Final Rejection — §103 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
86%
Grant Probability
99%
With Interview (+15.3%)
2y 7m
Median Time to Grant
Moderate
PTA Risk
Based on 630 resolved cases by this examiner. Grant probability derived from career allow rate.

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