Prosecution Insights
Last updated: April 19, 2026
Application No. 18/623,497

ALL-AROMATIC LIQUID-CRYSTALLINE HOMO-POLYIMIDES WITH AROMATIC ENDGROUPS AND CROSSLINKED PRODUCTS THEREFROM

Non-Final OA §103§112§DP
Filed
Apr 01, 2024
Examiner
SLOAN, LILY KAYOKO
Art Unit
1762
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Government Of The United States AS Represented By The Secretary Of The Air Force
OA Round
1 (Non-Final)
64%
Grant Probability
Moderate
1-2
OA Rounds
3y 2m
To Grant
99%
With Interview

Examiner Intelligence

Grants 64% of resolved cases
64%
Career Allow Rate
33 granted / 52 resolved
-1.5% vs TC avg
Strong +40% interview lift
Without
With
+40.2%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
30 currently pending
Career history
82
Total Applications
across all art units

Statute-Specific Performance

§103
68.2%
+28.2% vs TC avg
§102
12.0%
-28.0% vs TC avg
§112
16.9%
-23.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 52 resolved cases

Office Action

§103 §112 §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 . Election/Restrictions Claims 17-34 are withdrawn from further consideration pursuant to 37 CFR 1.142(b) as being drawn to a nonelected invention, there being no allowable generic or linking claim. Election was made without traverse in the reply filed on 12/1/2025. 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 8-10 and 14 recites the variable "R.” However the variable R is not defined by claims 8-10 or claim 14. Claim Rejections - 35 USC § 103 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 35 U.S.C. 103 which forms the basis for all obviousness rejections set forth in this Office action: A patent for a claimed invention may not be obtained, notwithstanding that the claimed invention is not identically disclosed as set forth in section 102, if the differences between the claimed invention and the prior art are such that the claimed invention as a whole would have been obvious before the effective filing date of the claimed invention to a person having ordinary skill in the art to which the claimed invention pertains. Patentability shall not be negated by the manner in which the invention was made. The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. This application currently names joint inventors. In considering patentability of the claims the examiner presumes that the subject matter of the various claims was commonly owned as of the effective filing date of the claimed invention(s) absent any evidence to the contrary. Applicant is advised of the obligation under 37 CFR 1.56 to point out the inventor and effective filing dates of each claim that was not commonly owned as of the effective filing date of the later invention in order for the examiner to consider the applicability of 35 U.S.C. 102(b)(2)(C) for any potential 35 U.S.C. 102(a)(2) prior art against the later invention. Claims 1- 7 are rejected under 35 U.S.C. 103 as being unpatentable over Matsuo JP 7-26018 in view of Rome US 20140135448A1. Regarding claims 1-3 and 7, Matsuo teaches a polyimide comprising this structure: (Paragraph [0007]). PNG media_image1.png 237 635 media_image1.png Greyscale Matsuo teaches the diamine comprising the diamine to form the structure can have the following formula where X and Y each represent an oxygen atom (p. 5, [0006]): PNG media_image2.png 66 603 media_image2.png Greyscale This reads on the structure of W where m = 1. Matsuo’s examples include 1,3-bis(4-(4-aminophenoxy)phenoxy)benzene (p. 15-16, [0031]) which reads on the structure where m = 0. Matsuo teaches that R in the dianhydride component has a structure of PNG media_image3.png 171 463 media_image3.png Greyscale where W can be CH2. This structure differs from the claimed structure by the presence of a single repeating phenyl group. Nevertheless, a prima facie case of obviousness may be made when chemical compounds have very close structural similarities and similar utilities. "An obviousness rejection based on similarity in chemical structure and function entails the motivation of one skilled in the art to make a claimed compound, in the expectation that compounds similar in structure will have similar properties." In re Payne, 606 F.2d 303, 313, 203 USPQ 245, 254 (CCPA 1979). See MPEP 2144.09. The first claimed dianhydride differs from Matsuo only by the successive addition of a single phenyl group and therefore possesses similar structure. The claimed dianhydride and Matsuo’s dianhydride have similar utilities in that both are used to react with structurally similar diamines to obtain polyimides. Therefore, it would have been obvious to one of ordinary skill in the art at the time of filing to employ the first claimed dianhydride in Matsuo’s polyimides based on close structural similarity and similar utility, with a reasonable expectation that the resulting polyimides will have similar properties. Matsuo teaches the composition can comprise a reinforcing agent such as glass fiber or carbon fiber. This reads on the claimed filler. Matsuo is silent on the end capping agent of the composition. Rome teaches that acetylenic end-cappers like PEPA are generally lead to polyimides with improved heat resistance and mechanical strength (p. 3, [0037] and [0042]). Rome teaches a polyimide comprises a reaction with the diamine 1,3-bis(4-aminophenoxy)benzene (Paragraph [0047) and a dianhydride with the structure of PNG media_image4.png 111 346 media_image4.png Greyscale where G is a divalent group (Paragraph [0050]). It would have been obvious to one of ordinary skill in the art to end cap Matsuo’s polyimide with Rome’s PEPA for the advantage of improved heat resistance and mechanical strength. This reads on the claimed Z where Z is an alkyne group. Matsuo is also silent regarding the number of repeating units and the molecular weight of the composition. Rome teaches that polyimide include at least 1 but less than 20 residues of an aromatic di-amine (Claim 11). Rome also teaches that the polyimide comprises at least one residue of an aromatic non-acetylenic di-anhydride (Claim 11). This overlaps with the claimed range of n from 6-18. It would have been obvious for the polyimide of Matsuo to comprise the number of residues as taught by Rome because Matsuo teaches a substantially structurally similar polyimide with a majority of the components taught in Rome and Rome teaches a suitable number of residues for a polyimide with this structure. The combination of familiar elements according to known methods is likely to be obvious when it does no more than yield predictable results." KSR Int'l Co. v. Teleflex Inc., 550 U.S. 398, 416-21 (2007). See MPEP 2141. Therefore, Matsuo in view of Rome reads on the limitations of claims 1-3 and 7. Regarding claims 4-6, the R group of claims 4-6 is not a required component of the polyimide. Therefore the limitations of this R group are additionally optional. Therefore, Matsuo in view of Rome read on the limitations of claims 4-6. Regarding claim 16, the microparticle of claim 15 is not a required component of the composition, therefore the limitations of the microparticle or nanoparticle of claim 15 is optional. 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. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Claims 1-14 are provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-14 of copending application No. US 18/299353 (henceforth called ‘353) in view of Rome US 20140135448A1. . ‘652 teaches the exact structure of claims 1-14: PNG media_image5.png 101 286 media_image5.png Greyscale where W is PNG media_image6.png 112 292 media_image6.png Greyscale and m is zero or 1 and, PNG media_image7.png 88 472 media_image7.png Greyscale where m is one or 2. ‘652 also teaches Ar is PNG media_image8.png 366 338 media_image8.png Greyscale and Z is PNG media_image9.png 66 278 media_image9.png Greyscale or a hydrogen. However the claims are silent on the polyimide being a composite comprising a filler. Rome teaches a polyimide comprises a reaction with the diamine 1,3-bis(4-aminophenoxy)benzene (Paragraph [0047). and a dianhydride with the structure of PNG media_image4.png 111 346 media_image4.png Greyscale where G is a divalent group (Paragraph [0050]). Rome also teaches the incorporation of the acetylenic end-cappers like PEPA (Paragraph [0036]). Rome teaches that polyimide include at least 1 but less than 20 residues of an aromatic di-amine (Claim 11). Rome also teaches that the polyimide comprises at least one residue of an aromatic non-acetylenic di-anhydride (Claim 11). Therefore, Rome teaches a substantially similar polyimide to the one taught in the claims of ‘353. Rome teaches that a filler can be added to this substantially similar polyimide (Paragraph [0130]). It would have been obvious to one of ordinary skill in the art to combine the teaching of the substantially similar polyimide of Rome which is blended with a filler with the polyimide taught in ‘353 as this added filler is recognized as a suitable additive substantially similar polyimides. The selection of a known material based on its suitability for its intended use is prima facie obvious. See MPEP 2144.07 Therefore, though the filler is not referenced in the claims, ‘353 reads on the limitations of claim 1-14. This is a provisional nonstatutory double patenting rejection. Allowable Subject Matter Claims 8-14 are objected to as being dependent upon a rejected base claim, but would be allowable if the 112(b) and nonstatutory double patenting rejections presented above re overcome and claim 8 is rewritten in independent form including all of the limitations of the base claim and any intervening claims. Regarding claim 8, and all dependent claims, neither JP JP07-026018 A(1995) nor Rome US 20140135448 A1 teach the limitations of claim 8. Relevant Prior Art Katano US 20150275089 teaches a polymer used for liquid crystal alignment comprising the structure of dianhydride PAN-1 PNG media_image10.png 167 341 media_image10.png Greyscale (Paragraph [0027]). Katano also teaches the polymer comprises a diamine PNG media_image11.png 97 343 media_image11.png Greyscale (DI-7), (Paragraph [0046]) where G can be -O-. Katano also teaches that this diamine is present in addition to a photopolymerization diamine (Paragraph [0046]). Because this second diamine is present with a second diamine, this does not read on the claimed structure. Tamura KR20100088072A teaches a polyimide for a liquid crystal alignment film comprising the dianhydride structure PNG media_image12.png 98 475 media_image12.png Greyscale (Paragraph [0039]). Tamura also teaches that the composition comprises a diamine PNG media_image13.png 55 205 media_image13.png Greyscale (Paragraph [0121]). Tamura teaches this diamine is the second diamine used, therefore this does not read on the structure of claim 1 or claim 8 (Page 7). Oguchi CN104059227A teaches a liquid crystal alignment film comprising the structure PNG media_image14.png 55 492 media_image14.png Greyscale where G22 can be -O- (Page 5) and a dianhydride with the structure of formula 1. Oguchi also teaches the liquid crystal alignment film has the anhydride of PNG media_image15.png 97 393 media_image15.png Greyscale (Page 4). However Oguchi teaches two dianhydrides in the film (Paragraph [0001]). Shoji JPH05112644A teaches a polyimide film comprising 2 types of amine components (Paragraph [0030]). Shoji also teaches the polyimide film comprises a dianhydride component and an amine component where the amine component can have the structure of PNG media_image16.png 47 192 media_image16.png Greyscale (Paragraph [0010]). Shoji also teaches the dianhydride component has a structure of PNG media_image17.png 101 170 media_image17.png Greyscale where R is PNG media_image18.png 57 262 media_image18.png Greyscale . Shoji does not read on the limitations of claim 1 or claim 8 because of the two types of amine components required resulting in a fundamentally different structure. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to LILY K SLOAN whose telephone number is (703)756-5875. The examiner can normally be reached Monday-Friday 9:00-5:30 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, Robert Jones can be reached at (571) 270-7733. 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. /LILY K SLOAN/Examiner, Art Unit 1762 /ROBERT S JONES JR/Supervisory Patent Examiner, Art Unit 1762
Read full office action

Prosecution Timeline

Apr 01, 2024
Application Filed
Sep 19, 2025
Response after Non-Final Action
Feb 19, 2026
Non-Final Rejection — §103, §112, §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12583013
RESIN COATED METAL SHEET, CONTAINER, AND METHOD FOR IMPROVING RETORT WHITENING PROPERTY
2y 5m to grant Granted Mar 24, 2026
Patent 12584016
CURABLE ELASTOMER COMPOSITION, CURED PRODUCT OF SAME, FILM PROVIDED WITH CURED PRODUCT, MULTILAYER BODY PROVIDED WITH FILM, METHOD FOR PRODUCING SAID MULTILAYER BODY, ELECTRONIC COMPONENT AND DISPLAY DEVICE EACH COMPRISING CURED PRODUCT, METHOD FOR DESIGNING CURABLE ELASTOMER COMPOSITION AND METHOD FOR DESIGNING TRANSDUCER DEVICE
2y 5m to grant Granted Mar 24, 2026
Patent 12552904
POLYPHOSPHAZENE AND MOLDING COMPOUND CONTAINING THE POLYPHOSPHAZENE
2y 5m to grant Granted Feb 17, 2026
Patent 12552907
POLYIMIDE-BASED FILM HAVING EXCELLENT FILLER DISPERSIBILITY AND DISPLAY DEVICE COMPRISING SAME
2y 5m to grant Granted Feb 17, 2026
Patent 12552920
Environmentally Friendly Impregnation Systems for Fiber Surface Treatment and Preparation Methods Thereof and an Impregnation Treatment Method
2y 5m to grant Granted Feb 17, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
64%
Grant Probability
99%
With Interview (+40.2%)
3y 2m
Median Time to Grant
Low
PTA Risk
Based on 52 resolved cases by this examiner. Grant probability derived from career allow 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