Prosecution Insights
Last updated: October 22, 2026
Application No. 18/895,432

IMAGE ENCRYPTION CIRCUIT AND METHOD FOR OPERATING THE SAME

Non-Final OA §112
Filed
Sep 25, 2024
Examiner
TRUONG, LAWRENCE QUANG
Art Unit
2434
Tech Center
2400 — Computer Networks
Assignee
Taiwan Semiconductor Manufacturing Company, Ltd.
OA Round
3 (Non-Final)
88%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
74%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allowance Rate
14 granted / 16 resolved
+29.5% vs TC avg
Minimal -13% lift
Without
With
+-13.3%
Interview Lift
resolved cases with interview
Fast prosecutor
2y 1m
Avg Prosecution
17 currently pending
Career history
46
Total Applications
across all art units

Statute-Specific Performance

§101
12.6%
-27.4% vs TC avg
§103
48.4%
+8.4% vs TC avg
§102
8.8%
-31.2% vs TC avg
§112
27.0%
-13.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 16 resolved cases

Office Action

§112
DETAILED ACTION Claims 21-23 are new. Claims 1, 4-14, and 16-23 are pending. 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 . Continued Examination Under 37 CFR 1.114 A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 08/05/2026 has been entered. Response to Arguments Applicant's arguments filed 08/05/2026 have been fully considered. Regarding Applicant’s argument that independent claim 1 and dependent claims 4-13, 21, and 22 is allowable, Examiner agrees that the claims would be allowable if the 112(b) rejection is overcome. Regarding Applicant’s argument that independent claim 14 and dependent claims 16-18, and 23 are allowable because the allowable subject matter of claim 3 has been incorporated into claim 14, Examiner respectfully disagrees. The corresponding embodiments of claims 14, 16-18, and 23 cannot be combined with the allowable subject matter. Claims 14, 16-18 and 23 are directed to an embodiment that uses a preset password to generate a second key. The allowable subject matter uses a subset of a subset of pixels to generate a second key. Regarding Applicant’s argument that independent claim 19 and dependent claim 20 is allowable, Examiner agrees that the claims would be allowable if the 112(b) rejection is overcome. Claim Rejections - 35 USC § 112 The following is a quotation of 35 U.S.C. 112(b): (b) CONCLUSION.—The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the inventor or a joint inventor regards as the invention. Claims 1, 4-14, and 16-23 are rejected under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), second paragraph, as being indefinite for failing to particularly point out and distinctly claim the subject matter which the inventor or a joint inventor (or for applications subject to pre-AIA 35 U.S.C. 112, the applicant), regards as the invention. Regarding claims 1, 14, and 19, the claims recite “a second subset of the plurality of pixels in the selected first subset”. There is insufficient antecedent basis for the term “the plurality of pixels”, therefore, the claim is rendered indefinite. For the purpose of examination, claims 1 and 14 will be interpreted as “wherein the random number generator circuit selects a second subset of a plurality of pixels from the selected first subset according to a second selection mechanism different from the first selection mechanism to obtain the second key” and claim 19 will be interpreted as “utilizing the random number generator circuit to select a second subset of a plurality of pixels from the selected first subset according to a second selection mechanism to obtain a second key.” Claims 4-13, 16-18, and 20-23 inherit this rejection. Regarding claim 7, the claim recites “generated by the respective latch to generate…”. There is insufficient antecedent basis for the term “the respective latch”, therefore, the claim is rendered indefinite. For the purpose of examination, the claim will be interpreted as “generated by respective latches to generate an output digital image signal.” Regarding claims 21 and 23, the claims recite “a second NOR gate, having a first input terminal… a second input terminal… and an output terminal”. It is unclear if the first input terminal, second input terminal, and an output terminal are the same of different from the first input terminal, second input terminal, and an output terminal of the first NOR gate, therefore, the claim is rendered indefinite. For the purpose of examination, the claims will be interpreted as “a second NOR gate, having a third input terminal coupled to the output terminal of the first NOR gate, a fourth input terminal receiving the data bit of each pixel in the digital image signal, and a second output terminal coupled to the second input terminal of the first NOR gate.” Regarding claim 22, the claim recite “a second NAND gate, having a first input terminal… a second input terminal… and an output terminal”. It is unclear if the first input terminal, second input terminal, and an output terminal are the same of different from the first input terminal, second input terminal, and an output terminal of the first NAND gate, therefore, the claim is rendered indefinite. For the purpose of examination, the claims will be interpreted as “a second NAND gate, having a third input terminal coupled to the output terminal of the first NAND gate, a fourth input terminal receiving the data bit of each pixel in the digital image signal, and a second output terminal coupled to the second input terminal of the first NAND gate.” Regarding claim 14, the claim recites “obtain a second key based on a preset password” and “selects a second subset of the plurality of pixels in the selected first subset… to obtain the second key”. It is unclear if the second key is based on a preset password or based on a second subset of the plurality of pixels in the selected first subset, therefore, the claim is rendered indefinite. Claims 16-18 and 23 inherit this rejection. Allowable Subject Matter Claims 1, 4-13, and 19-22 would be allowable if the 112(b) rejections are overcome. Claims 14, 16-18, and 23 would be allowable if Applicant can clarify how the allowable subject matter would be incorporated into the corresponding embodiment. Claims 14, 16-18 and 23 are directed to an embodiment that uses a preset password to generate a second key. The allowable subject matter uses a subset of a subset of pixels to generate a second key. Reasons for allowance will be provide at the time of allowance. Contact Information Any inquiry concerning this communication or earlier communications from the examiner should be directed to LAWRENCE TRUONG whose telephone number is (571)272-6973. The examiner can normally be reached Monday - Friday, 8:00 am - 4 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, Ali Shayanfar can be reached at (571) 270-1050. 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. /LAWRENCE TRUONG/Examiner, Art Unit 2434 /ALI SHAYANFAR/Supervisory Patent Examiner, Art Unit 2434
Read full office action

Prosecution Timeline

Show 1 earlier event
Dec 16, 2025
Non-Final Rejection mailed — §112
Mar 16, 2026
Response Filed
May 11, 2026
Examiner Interview (Telephonic)
May 29, 2026
Final Rejection mailed — §112
Aug 05, 2026
Request for Continued Examination
Aug 09, 2026
Response after Non-Final Action
Aug 13, 2026
Examiner Interview (Telephonic)
Aug 20, 2026
Non-Final Rejection mailed — §112 (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

3-4
Expected OA Rounds
88%
Grant Probability
74%
With Interview (-13.3%)
2y 1m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 16 resolved cases by this examiner. Grant probability derived from career allowance rate.

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