Prosecution Insights
Last updated: October 26, 2026
Application No. 18/997,460

METHOD FOR PREPARING CARBAMATED CELLULOSE FIBERS

Non-Final OA §102§103§DOUBLEPATENT
Filed
Jan 21, 2025
Priority
Sep 30, 2022 — JP 2022-158189 +1 more
Examiner
CALANDRA, ANTHONY J
Art Unit
1748
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Daio Paper Corporation
OA Round
1 (Non-Final)
63%
Grant Probability
Moderate
1-2
OA Rounds
1y 1m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 63% of resolved cases
63%
Career Allowance Rate
664 granted / 1056 resolved
-2.1% vs TC avg
Strong +19% interview lift
Without
With
+18.6%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
46 currently pending
Career history
1108
Total Applications
across all art units

Statute-Specific Performance

§101
1.4%
-38.6% vs TC avg
§103
42.1%
+2.1% vs TC avg
§102
19.3%
-20.7% vs TC avg
§112
27.0%
-13.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1056 resolved cases

Office Action

§102 §103 §DOUBLEPATENT
Detailed Office Action The communication dated 1/21/2025 has been entered and fully considered. Claims 1-9 are pending. Allowable Subject Matter Claims 3 and 7-9 would be allowable if the ODP rejection was overcome. 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 1-9 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-6 of U.S. Patent No. 12,768,098*. Although the claims at issue are not identical, they are not patentably distinct from each other because both disclose a continuous strip process for carbamating cellulosic paper. *10/20/2026 expected issue date. Claim 1 see patent claim 1. Claim 2 see patent claim 2. Claim 3, 7, and 8 see patent claims 1, 3, 4, and 6. Claim 4 see patent claim 1. Claim 5 see patent claim 3. Claim 6 see patent claims 1, 3, 4, and 6. 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. Claims 1 and 6 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by EP1306484 BRACEWELL, hereinafter BRACEWELL, as evidenced by Handbook for Pulp and Paper Technologists by SMOOK, hereinafter SMOOK. As for claims 1 and 6, discloses producing pulp into a continuous sheet (strip) on a fourdrinier paper machine with a size press treatment with urea [abstract, claim 2-4 and 0025]. A fourdrinier machine with size press includes a wet end, press section, partial drying, coating at size press and finally drying again as evidenced by SMOOK [pg. 228 Figure 16-1 fourdrinier paper machine and pg. 283 col. 1 par. 3]. The drying in a fourdrinier machine is between heated rolls (drying cylinders/cans) [pg. 228 Figure 16-1 fourdrinier paper machine]. Claim Rejections - 35 USC § 103 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, 2, and 4-6 are rejected under 35 U.S.C. 103 as being unpatentable over EP1306484 BRACEWELL, hereinafter BRACEWELL, in view of Papermaking Part 2, Drying edited by KARLSSON, hereinafter KARLSSON. As for claims 1, 2, and 4-6, BRACEWELL teaches the features as per above including producing pulp into a continuous sheet (strip) on a fourdrinier paper machine with a size press treatment with urea [abstract, claim 2-4 and 0025]. The Examiner argued that in BRACEWELLL a fourdrinier with size press was understood to wet end, press section, partial drying, coating at size press and finally drying again as evidenced by SMOOK. Alternatively, should the applicant argue that those features are not anticipated by BRACEWEL, they are obvious over KARLSSON. KARLSSON discloses a size press that is between the dryer sections [pg. 213-214 and pg. 358 Table 4]. At the time of the invention it would be obvious to combine the known drying techniques of KARLSSON with the papermaking drying of BRACELL. The person of ordinary skill in the art would expect the dry the paper after size coating while allowing for high-speed production in the conventional fourdrinier paper machine. As for claim 2, KARLSSON discloses heated rolls [pg. 48 Figure 6 and pg. 111]. KARLSSON discloses that a paper machine of max size is 11 meters (11,000 mm) [pg. 508 section 5.1]. Therefore KARLSSON suggest a paper machine size of 11,000 mm or less which overlaps with the instant claimed range. KARLSSON also discloses specific machines with a width of 7 to 9 m [pg. 387]. As for claim 4, KARLSSON discloses the moisture level of 3% for fine papers at the size press [pg. 358 Table 4]. Further the dryer of KARLSSON has multiple dryer sections that goes to near 0% moisture [pg. 48 Figure 6]. As for claim 5, KARLSSON shows the sheet temperature going from 60 to 130 degrees C, which falls within the claimed range [pg. 48 Figure 6]. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ANTHONY J CALANDRA whose telephone number is (571)270-5124. The examiner can normally be reached Monday-Friday 7:45 AM -4:15 PM. 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, Abbas Rashid can be reached at (571)270-7457. 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. ANTHONY J. CALANDRA Primary Examiner Art Unit 1748 /Anthony Calandra/Primary Examiner, Art Unit 1748
Read full office action

Prosecution Timeline

Jan 21, 2025
Application Filed
Oct 13, 2026
Non-Final Rejection mailed — §102, §103, §DOUBLEPATENT (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12760471
PROCESS FOR MANUFACTURING A FIBER BASED CELLULOSE WEB FOR DRY FORMING
4y 2m to grant Granted Oct 13, 2026
Patent 12760469
METHOD FOR DIGESTING LIGNOCELLULOSIC MATERIAL
2y 10m to grant Granted Oct 13, 2026
Patent 12753551
METHOD FOR FRACTIONATION OF HIGHLY REFINED CELLULOSE
3y 1m to grant Granted Oct 06, 2026
Patent 12723350
METHOD FOR DISTRUBTING CHEMICALS IN DELIGNIFICTION STAGES OF PULP BLEACHING PROCESS
2y 10m to grant Granted Sep 01, 2026
Patent 12716175
TOILET PAPER ROLL
2y 7m to grant Granted Aug 25, 2026
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
63%
Grant Probability
82%
With Interview (+18.6%)
2y 11m (~1y 1m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1056 resolved cases by this examiner. Grant probability derived from career allowance rate.

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