Prosecution Insights
Last updated: July 17, 2026
Application No. 18/407,259

Evacuated Gratings and Methods of Manufacturing

Non-Final OA §DP
Filed
Jan 08, 2024
Priority
Aug 29, 2019 — provisional 62/893,715 +2 more
Examiner
FRASER, STEWART A
Art Unit
Tech Center
Assignee
DigiLens Inc.
OA Round
1 (Non-Final)
86%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 86% — above average
86%
Career Allowance Rate
1164 granted / 1352 resolved
+26.1% vs TC avg
Moderate +14% lift
Without
With
+14.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 5m
Avg Prosecution
26 currently pending
Career history
1368
Total Applications
across all art units

Statute-Specific Performance

§101
0.4%
-39.6% vs TC avg
§103
77.7%
+37.7% vs TC avg
§102
11.7%
-28.3% vs TC avg
§112
4.2%
-35.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1352 resolved cases

Office Action

§DP
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 . This is the initial office action for US Patent Application No. 18/407259 by Waldern et al. Claims 1-20 are currently pending and have been fully considered. Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 1-20 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-29 of U.S. Patent No. 11,442,222. Although the claims at issue are not identical, they are not patentably distinct from each other because the pending claims contain similar method limitations to the claims recited in the patent. Regarding claims 1 and 2 of the pending application, the patent recites (Claim 1) a method for fabricating a deep surface relief grating (SRG), the method comprising providing a mixture of monomer and liquid crystal; providing a substrate; coating a layer of the mixture on a surface of the substrate; applying holographic recording beams to the layer to form a holographic polymer dispersed liquid crystal grating comprising alternating polymer rich regions and liquid crystal rich regions; and removing at least a portion of the liquid crystal in the liquid crystal rich regions to form a polymer surface relief grating, wherein the liquid crystal rich regions comprise air gaps after removing at least a portion of the liquid crystal in the liquid crystal rich regions. The patent further recites (Claim 18) applying a protective layer over the deep SRG. In view of claims 1 and 2 of the pending application, the protective layer recited in the patent is considered to be analogous to an optical material that is deposited on the polymer rich regions such that the optical material covers the surfaces of the polymer surface relief grating and at least partially fills the air gaps. Regarding claims 3-20 of the pending application, the patent recites (Claims 2-5 and 7-29) analogous limitations related to the method for fabricating the deep SRG recited in independent claim 1. Allowable Subject Matter The following is a statement of reasons for the indication of allowable subject matter: Claims 1-20 contain allowable subject matter because the prior art does not teach or suggest Applicant’s claimed method for fabricating a deep surface relief grating (SRG) that includes applying holographic recording beams to the layer to form a holographic polymer dispersed liquid crystal grating comprising alternating polymer rich regions and liquid crystal rich regions; and removing at least a portion of the liquid crystal in the liquid crystal rich regions to form a polymer surface relief grating, wherein the liquid crystal rich regions comprise air gaps after removing at least a portion of the liquid crystal in the liquid crystal rich regions, and depositing an optical material onto the polymer rich regions such that the optical material covers the surfaces of the polymer surface relief grating and at least partially fills the air gaps. Any inquiry concerning this communication or earlier communications from the examiner should be directed to STEWART A FRASER whose telephone number is (571)270-5126. The examiner can normally be reached M-F, 7am-4pm, EST. 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, Miriam Stagg can be reached at 571-270-5256. 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. /STEWART A FRASER/Primary Examiner, Art Unit 1724
Read full office action

Prosecution Timeline

Jan 08, 2024
Application Filed
Jul 01, 2026
Non-Final Rejection mailed — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12683174
SYSTEM AND METHOD FOR ESTIMATING HYDROGEN CONCENTRATION OF FUEL CELL
3y 7m to grant Granted Jul 14, 2026
Patent 12683253
BATTERY MODULE AND ELECTRONIC DEVICE CONTAINING THE SAME
3y 3m to grant Granted Jul 14, 2026
Patent 12683219
BATTERY MODULE COMPRISING BENT VAPOR CHAMBER
3y 1m to grant Granted Jul 14, 2026
Patent 12671114
SILICON-BASED ENERGY STORAGE DEVICES WITH LIPO2F2 SALT-CONTAINING ELECTROLYTE FORMULATIONS
6y 0m to grant Granted Jun 30, 2026
Patent 12649854
METHOD OF PREPARING LAMINATE AND LAMINATE FOR OPTICAL USE
3y 5m to grant Granted Jun 09, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
86%
Grant Probability
99%
With Interview (+14.2%)
2y 5m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1352 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month