Prosecution Insights
Last updated: July 17, 2026
Application No. 19/065,981

Resettable Photon Number Resolving Detector

Non-Final OA §102
Filed
Feb 27, 2025
Priority
Sep 06, 2022 — provisional 63/404,104 +1 more
Examiner
KO, TONY
Art Unit
2878
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Psiquantum Corp.
OA Round
1 (Non-Final)
88%
Grant Probability
Favorable
1-2
OA Rounds
1y 0m
Est. Remaining
90%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allowance Rate
780 granted / 888 resolved
+19.8% vs TC avg
Minimal +2% lift
Without
With
+2.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
20 currently pending
Career history
903
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
43.0%
+3.0% vs TC avg
§102
43.8%
+3.8% vs TC avg
§112
9.4%
-30.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 888 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. Claim(s) 9, 10 and 15 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Najafi et al (US 20200256722). Regarding claim 9, Najafi et al teach A photon number resolving circuit, comprising: a plurality of detection circuits (narrow detection segments distributed along the superconducting wire each independently photo-sensitive), each detection circuit of the plurality of detection circuits comprising: state to a non-superconducting state in response to an incident photon ([0046]); and a reset circuit (205) coupled in parallel with the superconducting photon detector, the reset circuit comprising a resistor (R) and an inductor (L – inherent kinetic inductance of each segments’ lead) coupled together in series; a waveguide optically coupled to the plurality of detection circuits; and a readout circuit (112) electrically coupled to the plurality of detection circuits. Regarding claim 10, Najafi et al teach ([0037]) the readout circuit is a direct readout circuit that converts a voltage (V=I*R see also figures 3) from the plurality of detection circuits into a current, wherein an amplitude of the current depends on a number of detection circuits of the plurality of detection circuits in the non-superconducting state. Regarding claim 15, Najafi et al teach a current source (coupled to the plurality of detection circuits, the current source configured to bias each superconducting photon detector such that a single incident photon causes the superconducting photon detector to transition from the superconducting state to the non- superconducting state. Allowable Subject Matter Claims 1-8 are allowed. The following is an examiner’s statement of reasons for allowance: Regarding claim 1, prior art of record does not teach the reset circuit comprising a resistor (R) and an inductor (L) coupled together in series, wherein the resistor is composed of a metal layer and a layer of superconducting material. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Claims 11-14 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to TONY KO whose telephone number is (571)272-1926. The examiner can normally be reached Monday-Friday 9-5pm. 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, Georgia Epps can be reached at 571-272-2328. 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. /TONY KO/Primary Examiner, Art Unit 2878 TK
Read full office action

Prosecution Timeline

Feb 27, 2025
Application Filed
Jul 02, 2026
Non-Final Rejection mailed — §102 (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

1-2
Expected OA Rounds
88%
Grant Probability
90%
With Interview (+2.4%)
2y 5m (~1y 0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 888 resolved cases by this examiner. Grant probability derived from career allowance rate.

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