Prosecution Insights
Last updated: April 19, 2026
Application No. 18/473,007

MARKED CELLULOSE ACETATE FIBRES, MANUFACTURING METHODS AND PRODUCTS COMPRISING SUCH FIBRES

Non-Final OA §103
Filed
Sep 22, 2023
Examiner
FELTON, MICHAEL J
Art Unit
1747
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Rhodia Acetow GmbH
OA Round
1 (Non-Final)
59%
Grant Probability
Moderate
1-2
OA Rounds
4y 9m
To Grant
74%
With Interview

Examiner Intelligence

Grants 59% of resolved cases
59%
Career Allow Rate
287 granted / 486 resolved
-5.9% vs TC avg
Moderate +15% lift
Without
With
+14.8%
Interview Lift
resolved cases with interview
Typical timeline
4y 9m
Avg Prosecution
41 currently pending
Career history
527
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
58.1%
+18.1% vs TC avg
§102
18.6%
-21.4% vs TC avg
§112
18.8%
-21.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 486 resolved cases

Office Action

§103
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 . 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 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. Claim(s) 1-19 is/are rejected under 35 U.S.C. 103 as being unpatentable over Busby et al. (WO 2016/179220) in view of Jacob et al. (US 20110207125 A1). Regarding claims 1, 4, 6, 7, 8, 10, and 19 Busby et al. disclose forming cellulose acetate for use in cigarette filters in order to form traceable smoking articles and disclose in claim 1: (a) forming tow from filaments; (b) crimping the tow; (c) drying the tow; (d) baling the tow; and (e) incorporating an additive with an identifying marking during, between or after any of steps (a) to (c), wherein the identifying marking provides origin information concerning the tow [0017]. Busby et al. disclose several identifying marking methods to combat fake products but do not disclose using polynucleotides as the identifying mark. However, Jacob et al. disclose a method for labeling products, including tobacco products, using polynucleotides [0074]. The polynucleotide may be deposited on the the product by spraying or dipping the product in a solution of the polynucleotide [0083]. Jacob et al. further disclose detecting the polynucleotides from an article by extracting them with an aqueous solution (i.e. obtaining a sample) and performing PCR and then identifying the nucleotide sequence [0198]-[0201] and using the information to verify authenticity. It would have been obvious to one of ordinary skill in the art at the time of invention/filing to use the DNA labeling disclosed by Jacob et al. as the identifying mark in the invention of Busby et al. Using the DNA label of Jacob et al. would result in a difficult to counterfeit marker (as disclosed by Jacob et al.) and therefore a difficult to counterfeit smoking article. Regarding claims 2 and 11, Jacob et al. disclose using polynulceotides containing 5-200 nucleotides [0037]. Regarding claim 3 and 12, Jacob et al. disclose that synthetic “modified bases” may be used such as the dihydriuridine, inosine, or pseudo uracil [0032]. Regarding claim 5, Jacob et al. disclose adding specific amounts of markers to produces [0451]. In addition or alternatively, Jacob et al. also disclose spraying as a method of applying the nucleotide. I would have been notoriously well known in the art to spray a controlled or metered amount of product on each item. For instance, Busby et al. disclose spraying patterns of forensic markers onto cellulose acetate tow [0016]. It would have been obvious to one of ordinary skill that the amount and pattern of spray would need to be controlled to form the pattern disclosed by Busby et al. Regarding claim 9, Busby et al. disclose that the identifying marking can be added continuously (i.e. to the entire length and not in a pattern)[0017]. In addition, dipping the product as disclosed by Jacob et al. would deposit the polynucleotide over the entire length. Regarding claims 13-18, Busby et al. disclose that the information corresponding to the identifying marking may comprise: Fiber or filament manufacturer (i.e. producer) Fiber or filament manufacture date, Fiber or filament manufacture location (i.e. product line), Fiber or filament identifier (i.e. characteristic), [0019] Fiber or filament bale identifier [0019] (i.e. batch), Tow manufacturer [0021], Tow manufacture date [0021], Tow manufacture location [0021], Tow identifier [0021], Claim(s) 20 is/are rejected under 35 U.S.C. 103 as being unpatentable over Busby et al. (WO 2016/179220) and Jacob et al. (US 20110207125 A1) as applied to claim 19 above and in further view of Connolly (US 20040166520 A1). Jacob et al. discloses extracting polynucleotide tags from marked items but does not expressly disclose that the extraction comprises contacting with an aqueous buffer. However, Connolly discloses a similar process of identifying tagged items using nucleic acid tags and states that: Extraction of the nucleic acid taggant from the tagged item generally involves dissolving the taggant nucleic acid from the item with aqueous or organic buffers. The dissolvent will not degrade the DNA or interfere with the recognition process. It would have been obvious to one of ordinary skill in the art at the time of invention to use the aqueous buffer of Connolly to extract the nucleotides of Jacob et al. because Connolly discloses that the buffered solutions will not degrade the DNA or interfere with the recognition process, presenting a reasonable expectation of success for extracting and identifying the nucleotides. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to MICHAEL J FELTON whose telephone number is (571)272-4805. The examiner can normally be reached Monday, Thursday-Friday 7:00-4:30, Wednesday 7:00-1:00. 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, Michael H Wilson can be reached on 571-270-3882. 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. /Michael J Felton/Primary Examiner, Art Unit 1747
Read full office action

Prosecution Timeline

Sep 22, 2023
Application Filed
Apr 03, 2026
Non-Final Rejection — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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2y 5m to grant Granted Mar 03, 2026
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Patent 12538940
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Patent 12532907
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Patent 12514281
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2y 5m to grant Granted Jan 06, 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
59%
Grant Probability
74%
With Interview (+14.8%)
4y 9m
Median Time to Grant
Low
PTA Risk
Based on 486 resolved cases by this examiner. Grant probability derived from career allow rate.

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