Prosecution Insights
Last updated: May 29, 2026
Application No. 18/328,679

ELECTRICAL SUPPLY SYSTEM OF AN ELECTRICAL PROPULSION SYSTEM OF AN AIRCRAFT

Final Rejection §102
Filed
Jun 02, 2023
Priority
Jun 09, 2022 — FR 2205518
Examiner
APPLEGATE, SARAH ARIMINTIA
Art Unit
1725
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Airbus Operations SAS
OA Round
2 (Final)
62%
Grant Probability
Moderate
3-4
OA Rounds
2m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 62% of resolved cases
62%
Career Allowance Rate
10 granted / 16 resolved
-2.5% vs TC avg
Strong +43% interview lift
Without
With
+42.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
33 currently pending
Career history
63
Total Applications
across all art units

Statute-Specific Performance

§103
84.0%
+44.0% vs TC avg
§102
5.0%
-35.0% vs TC avg
§112
0.8%
-39.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 16 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 as failing to comply with 37 CFR 1.84(p)(5) because they include the following reference character(s) not mentioned in the description: FIG. 5 & FIG. 6 describes “Z21a”, “Z22a”, “B21”, “B22” which are not in the specification. Corrected drawing sheets in compliance with 37 CFR 1.121(d), or amendment to the specification to add the reference character(s) in the description in compliance with 37 CFR 1.121(b) 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. 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 Rejections - 35 USC § 102 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. 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claims 1-14 are rejected under 35 U.S.C. 102(a)(1) and (a)(2) as being anticipated by Morrison (US 20200398992 A1, “Morrison”). Regarding claim 1, Morrison discloses an aircraft comprising: a propulsion propeller configured to provide aerodynamic thrust to propel the aircraft in flight (see abstract “aircraft” & “propeller assemblies” & see [0080] “differential thrust from the electric motors operating propellers/rotors 29” & “guide the aircraft 1000 to its intended destination” reads on flight); an electrical propulsion system including at least one electrical propulsion motor including independent electrical windings, a first electrical winding and a second electrical winding independent of the first electrical winding, wherein the at least one electrical propulsion motor is mechanically coupled to the propulsion propeller and configured to drive the propulsion propeller (see [0013] “propulsion system” & see [0123] “multiple electric motors”), an electrical supply system comprising (see [0110] “electrical components needed to supply the motor and propeller combinations with power”): a first set of fuel cells electrically coupled to the first electrical winding and configured to supply electrical power to the first electrical winding (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”); a first compressor configured to supply compressed ambient air to the first set of fuel cells and the second set of fuel cells (see [0019] “one or more oxygen delivery mechanisms” & “configured to gather and compress ambient air into compressed air that is supplied to an air inlet and an inflow end of the oxygen flowfield plate of each hydrogen fuel cell of the plurality of hydrogen fuel cells” & “compressors”), wherein the compressed ambient air provides oxygen which reacts with hydrogen in the first and the second sets of fuel cells to generate the electrical power (see abstract “fuel cells working together to process gaseous oxygen from air compressed by turbochargers, superchargers, blowers or local oxygen supply and gaseous hydrogen from liquid hydrogen transformed by heat exchangers” & see [0010] “generating electrical power using a fuel cell”); and a first electric motor mechanically coupled to drive the first compressor, the first electric motor comprising a third electrical winding electrically coupled to the first set of fuel cells and a fourth electrical winding electrically coupled to the second set of fuel cells (see [0031] “compressor motors”; see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”). Regarding claim 2, Morrison discloses the aircraft of claim 1 and further discloses wherein the electrical supply system further comprises a cooling system configured to cool at least part of the first and the second sets of fuel cells, the cooling system comprising a first fan including a fifth electrical winding electrically coupled to the first set of fuel cells and a sixth electrical winding electrically coupled to the second set of fuel cells (see [0068] “cooling system 44” & see [0031] “fan motors”). Regarding claim 3, Morrison discloses an electrical supply system for an electrical propulsion system of an aircraft (see abstract “an electrical circuit configured to collect electrons from the plurality of hydrogen fuel cells to supply voltage and current to motor controllers”; see [0110] “electrical components needed to supply the motor and propeller combinations with power”) the electrical supply system comprising: a first set of fuel cells configured to supply electrical power to at least one electric propulsion motor driving a propeller configured to provide aerodynamic thrust to the aircraft (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)” & see abstract “aircraft” & “propeller assemblies” & see [0080] “differential thrust from the electric motors operating propellers/rotors 29”); a second set of fuel cells configured to supply electrical power to the at least one electric propulsion motor driving the propeller (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”); a first compressor configured to supply compressed ambient air to at least one of the first and second sets of fuel cells, wherein the compressed ambient air provides oxygen which reacts with hydrogen in the first sets of fuel cells to generate the electrical power (see [0019] “one or more oxygen delivery mechanisms” & “configured to gather and compress ambient air into compressed air that is supplied to an air inlet and an inflow end of the oxygen flowfield plate of each hydrogen fuel cell of the plurality of hydrogen fuel cells” & “compressors”) and a first electric motor configured to drive the first compressor, wherein the first electric motor includes a first electrical winding electrically coupled to the first set of fuel cells and a second electrical winding electrically coupled to the second set of fuel cells, wherein the first electrical winding is electrically isolated from the second electrical winding (see [0031] “compressor motors”; see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”). Regarding claim 4, Morrison discloses the electrical supply system of claim 3 and further discloses wherein the first compressor is configured to supply compressed ambient air to the first and the second sets of fuel cells (see [0019] “one or more oxygen delivery mechanisms” & “configured to gather and compress ambient air into compressed air that is supplied to an air inlet and an inflow end of the oxygen flowfield plate of each hydrogen fuel cell of the plurality of hydrogen fuel cells” & “compressors”). Regarding claim 5, Morrison discloses the electrical supply system of claim 3 and further discloses further comprising a third set of fuel cells configured to supply electrical power to the at least one electrical propulsion motor (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”), wherein the first compressor is configured to supply compressed air to the first, the second and the third sets of fuel cells (see [0019] “one or more oxygen delivery mechanisms” & “configured to gather and compress ambient air into compressed air that is supplied to an air inlet and an inflow end of the oxygen flowfield plate of each hydrogen fuel cell of the plurality of hydrogen fuel cells” & “compressors”) and the first electric motor includes a third electrical winding electrically coupled to the third set of fuel cells (see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 6, Morrison discloses the electrical supply system of claim 3 and further discloses further comprising: a third set of fuel cells configured to provide electrical power to the at least one electrical propulsion motor (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”); a fourth set of fuel cells configured to supply electrical power to the at least one electric propulsion motor (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”); a second compressor configured to supply compressed ambient air to at least one of the third and the fourth sets of fuel cells (see [0019] “one or more oxygen delivery mechanisms” & “configured to gather and compress ambient air into compressed air that is supplied to an air inlet and an inflow end of the oxygen flowfield plate of each hydrogen fuel cell of the plurality of hydrogen fuel cells” & “compressors”); and a second electric motor configured to mechanically drive the second compressor, wherein the second electric motor includes a third electrical winding electrically coupled to the third set of fuel cells and a fourth electrical winding electrically coupled to the fourth set of fuel cells (see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 7, Morrison discloses the electrical supply system of claim 3 and further discloses wherein the compressor includes a turbo-compressor (see [0019] “turbocharger” & “compressors”). Regarding claim 8, Morrison discloses the electrical supply system of claim 3 and further discloses further comprising: a cooling system configured to cool at least the first and the second, sets of the fuel cells, the cooling system comprising a first fan with a fifth electrical winding electrically coupled to the first set of the fuel cells, and a sixth electrical winding electrically coupled to the second set of the fuel cells (see [0068] “cooling system 44” & see [0031] “fan motors”; see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 9, Morrison discloses the electrical supply system of claim 6 and further discloses further comprising a cooling system including: a first fan with a fifth electrical winding electrically coupled to the first set of the fuel cells, and a sixth electrical winding electrically coupled to the second set of the fuel cells, wherein the first fan is configured to cool the first and the second sets of the fuel cells; and a second fan configured to cool the third and the fourth sets of the fuel cells, and the second fan includes a seventh electrical winding electrically coupled to the third set of the fuel cells, and an eighth electrical winding electrically coupled to the fourth set of the fuel cells (see [0068] “cooling system 44” & see [0031] “fan motors” & see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 10, Morrison discloses the electrical supply system of claim 5 and further discloses further comprising a first fan configured to cool the first, the second and the third sets of the fuel cells, and the first fan includes an electrical motor with a fourth winding electrically powered by the first set of the fuel cells, a fifth winding electrically powered by the second set of fuel cells, and a sixth winding electrically coupled to the third set of fuel cells (see [0068] “cooling system 44” & see [0031] “fan motors”; see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 11, Morrison discloses the electrical supply system of claim 10 and further discloses further comprising: a second fan configured to cool at least one of the first, the second and the third sets of the fuel cells, the second fan comprising a seventh winding electrically coupled to the third set of the fuel cells (see [0068] “cooling system 44” & see [0031] “fan motors”; see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 12, Morrison discloses an electrical propulsion system of an aircraft comprising: an electric propulsion motor configured to drive a propeller configured to provide aerodynamic thrust to the aircraft (see [0013] “propulsion system”; see [0123] “multiple electric motors”; see [0080] “differential thrust from the electric motors operating propellers/rotors 29”), wherein the electric propulsion motor includes a first winding and a second winding electrically isolated from the first winding (see [0013] “propulsion system”; see [0123] “multiple electric motors”); a first set of fuel cells configured to supply electrical power to the first winding (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”); a second set of fuel cells configured to supply electrical power to the second winding (see [0110] “the fuel cell modules 18 (e.g., one or more hydrogen-powered fuel cells or hydrocarbon-fueled motors) create the electricity to power the six motor and propeller assemblies 29 (of multiple motors and propellers 29)”); a first compressor configured to supply compressed ambient air to the first set of fuel cells and the second set of fuel cells, wherein the compressed ambient air provides oxygen which reacts with hydrogen in the first and the second sets of fuel cells to generate the electrical power (see [0019] “one or more oxygen delivery mechanisms” & “configured to gather and compress ambient air into compressed air that is supplied to an air inlet and an inflow end of the oxygen flowfield plate of each hydrogen fuel cell of the plurality of hydrogen fuel cells” & “compressors”); and a first electric motor configured to drive the first compressor, wherein the first electric motor includes a third electrical winding electrically coupled to the first set of fuel cells and a fourth electrical winding electrically coupled to the second set of fuel cells, wherein the fourth electrical winding is electrically isolated from the third electrical winding (see [0080] “electric motors operating propellers/rotors 29”). Regarding claim 13, Morrison discloses the electrical propulsion system of claim 12 and further discloses further comprising: a first controller configured to control application of the electrical power from the first set of the fuel cells to the first winding, and a second controller configured to control application of the electrical power from the second set of the fuel cells to the second winding (see abstract “controllers” & [0017] “plurality of motor controllers configured to control a plurality of motor and propeller assemblies; zero, one or more battery arrays; one or more circuit boards; one or more processors; one or more memory; one or more electronic components, electrical connections, electrical wires”). Regarding claim 14, Morrison discloses the electrical propulsion system of claim 13 and further discloses further comprising: a first fan with a fifth electrical winding electrically coupled to the first set of the fuel cells, and a sixth electrical winding electrically coupled to the second set of the fuel cells, wherein the first fan is configured to cool the first and the second sets of fuel cells (see [0068] “cooling system 44” & see [0031] “fan motors”; see [0080] “electric motors operating propellers/rotors 29”). Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to SARAH APPLEGATE whose telephone number is (571)270-0370. The examiner can normally be reached Monday - Friday 9:00 am - 5:00 pm ET. 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, Nicole Buie-Hatcher can be reached at (571) 270-3879. 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. /S.A.A./Examiner, Art Unit 1725 /JAMES M ERWIN/Primary Examiner, Art Unit 1725 01/20/2026
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Prosecution Timeline

Jun 02, 2023
Application Filed
Jan 23, 2026
Non-Final Rejection mailed — §102
Feb 20, 2026
Interview Requested
Mar 03, 2026
Response Filed
Mar 03, 2026
Examiner Interview Summary
Mar 03, 2026
Applicant Interview (Telephonic)
May 27, 2026
Final Rejection mailed — §102 (current)

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Prosecution Projections

3-4
Expected OA Rounds
62%
Grant Probability
99%
With Interview (+42.9%)
3y 2m (~2m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 16 resolved cases by this examiner. Grant probability derived from career allowance rate.

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