Prosecution Insights
Last updated: October 01, 2026
Application No. 18/829,062

STRUCTURES FOR PHYSICAL UNCLONABLE FUNCTION USING SPONTANEOUS CHIRAL SYMMETRY BREAKING AND METHOD OF PREPARING THE SAME

Non-Final OA §112
Filed
Sep 09, 2024
Priority
Dec 17, 2021 — RE 10-2021-0181789 +1 more
Examiner
VISCONTI, GERALDINA
Art Unit
1737
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Korea Advanced Institute of Science and Technology
OA Round
3 (Non-Final)
86%
Grant Probability
Favorable
3-4
OA Rounds
1m
Est. Remaining
88%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allowance Rate
1169 granted / 1351 resolved
+21.5% vs TC avg
Minimal +2% lift
Without
With
+1.5%
Interview Lift
resolved cases with interview
Typical timeline
2y 2m
Avg Prosecution
42 currently pending
Career history
1382
Total Applications
across all art units

Statute-Specific Performance

§101
2.1%
-37.9% vs TC avg
§103
23.9%
-16.1% vs TC avg
§102
25.2%
-14.8% vs TC avg
§112
30.9%
-9.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1351 resolved cases

Office Action

§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 . This office action is responsive to the Request for Continued Examination filed 15 May 2026, whereby the Amendment and Remarks filed 27 April 2026 was entered. Claims 1-10 remain pending and presently under consideration in this application. Response to Amendment Applicants have amended the base independent claim as follows and argue that said amendment sufficiently distinguishes the liquid crystal composition of the present claims from that of the prior art of record: PNG media_image1.png 494 851 media_image1.png Greyscale Response to Arguments Applicant's arguments filed in response to the rejection of claims under 35 U.S.C. 112(b) or 35 U.S.C. 112(pre-AIA ), second paragraph, as set forth in paragraph 10 of the previous FINAL office action on the merits, said arguments to the effect that “applicant’s claimed method is thereby specified in a clear and definite manner”, have been fully considered but they are not persuasive. Initially, the Examiner notes that the first step in the claimed method, i.e., PNG media_image2.png 67 852 media_image2.png Greyscale appears to be missing an active step between the recitation of “comprising:” and (a) self-assembling bent-shaped liquid crystal molecules”. Amended claim 1 fails to particularly point out and distinctly claim the active step necessary to obtain a helical nanofilaments (HNF) having a twisted layered structure from the self-assembling bent-shaped liquid crystal molecules. It appears as if the step of irradiating the HNF photonic crystal structure with linearly polarized light should be designated as “(c)”, in light of the amendment introducing the step designations of “(a)” and “(b)”. Also, the claim is drawn to a method of making a physical unclonable function structure, but yet the ultimate line of the claim recites that “HNF photonic crystal structure is in the form of a film or a flake”, with no apparent nexus. 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. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 1-10 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. Amended claim 1 is rejected as being vague and indefinite when it recites PNG media_image3.png 252 865 media_image3.png Greyscale Amended claim 1 fails to particularly point out and distinctly claim the sequence of active, positive steps delimiting the claimed method of making a physical unclonable function structure. Amended claim 1 fails to particularly point out and distinctly claim the active step necessary in “(a)” to obtain a helical nanofilaments (HNF) having a twisted layered structure from the self-assembling bent-shaped liquid crystal molecules. Also, in light of the amendment introducing the step designations of “(a)” and “(b)”, it appears as if the step wherein linearly polarizing light is irradiated on the HNF photonic crystal structure should be designated as “(c)”. As mentioned in the previous FINAL office action on the merits, the claim is drawn to a “method of making a physical unclonable function (PUF) structure” (emphasis added), but yet the ultimate line simply recites that the “HNF photonic crystal structure is in the form of a film or a flake”; what is the nexus between the “HNF photonic crystal structure is in the form of a film or a flake” and the “physical unclonable function (PUF) structure”? Claims 2 and 7 are rejected as being vague and indefinite when they each recite “wherein the bent-shaped liquid crystal molecule is at least one selected from the group consisting of an azobenzene dimer, MHOBOW of Chemical Formula 1, and NOBOW of Chemical Formula 2” (emphasis added); the scope of the protection sought by each of “MHOBOW” and “NOBOW” is not clear. Claims 2 and 7 each fail to particularly point out and distinctly claim the bent-shaped liquid crystal molecule utilized in the claimed method of making a physical unclonable function structure. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Geraldina Visconti whose telephone number is (571)272-1334. The examiner can normally be reached Monday-Friday, 8:00am-4:30pm. 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, Anthony J Zimmer can be reached at (571)270-3591. 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. GERALDINA VISCONTI Primary Examiner Art Unit 1737 /GERALDINA VISCONTI/Primary Examiner, Art Unit 1737
Read full office action

Prosecution Timeline

Sep 09, 2024
Application Filed
Aug 21, 2025
Non-Final Rejection mailed — §112
Nov 21, 2025
Response Filed
Feb 27, 2026
Final Rejection mailed — §112
Apr 27, 2026
Response after Non-Final Action
May 15, 2026
Request for Continued Examination
May 20, 2026
Response after Non-Final Action
Jul 16, 2026
Non-Final Rejection mailed — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12735641
Liquid-Crystal Medium
4y 10m to grant Granted Sep 15, 2026
Patent 12729341
Polymerizable Liquid Crystal Material and Polymerized Liquid Crystal Film
1y 6m to grant Granted Sep 08, 2026
Patent 12709711
LIQUID CRYSTAL ELASTOMER COMPOSITIONS AND METHODS OF MAKING THE SAME
1y 3m to grant Granted Aug 18, 2026
Patent 12698444
LIQUID-CRYSTALLINE MEDIUM
1y 11m to grant Granted Aug 04, 2026
Patent 12692441
LIQUID-CRYSTAL MEDIUM
4y 9m to grant Granted Jul 28, 2026
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
88%
With Interview (+1.5%)
2y 2m (~1m remaining)
Median Time to Grant
High
PTA Risk
Based on 1351 resolved cases by this examiner. Grant probability derived from career allowance rate.

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