Prosecution Insights
Last updated: August 06, 2026
Application No. 18/833,059

USE OF BACTEROIDES FRAGILIS IN IMPROVEMENT AND TREATMENT OF DIARRHEA

Non-Final OA §102§103§112§DP
Filed
Jul 25, 2024
Priority
Jan 25, 2022 — CN 202210089886.6 +2 more
Examiner
BERKE-SCHLESSEL, DAVID W
Art Unit
Tech Center
Assignee
Guangzhou Zhiyi Biotechnology Co. Ltd.
OA Round
1 (Non-Final)
67%
Grant Probability
Favorable
1-2
OA Rounds
10m
Est. Remaining
98%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
497 granted / 746 resolved
+6.6% vs TC avg
Strong +32% interview lift
Without
With
+31.9%
Interview Lift
resolved cases with interview
Typical timeline
2y 10m
Avg Prosecution
44 currently pending
Career history
790
Total Applications
across all art units

Statute-Specific Performance

§101
9.5%
-30.5% vs TC avg
§103
38.0%
-2.0% vs TC avg
§102
15.7%
-24.3% vs TC avg
§112
24.9%
-15.1% vs TC avg
Black line = Tech Center average estimate • Based on career data from 746 resolved cases

Office Action

§102 §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 . 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 3, 6, 8 and 9 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. Claims 3, 6, and 9 include exemplary language, like “preferably,” “illustratively,” and “for example.” Every situation in which this language occurs is indefinite, as it is unclear if these are meant to be limitations, or merely provide examples for the artisan to better understand the invention. See MPEP 2173.05(d). If the intent was the former, please provide definite claim language; if the intent was the latter, this is the purpose of the specification. For the sake of examining the claims on their merit, it will be assumed that this is exemplary language, and should not be intended as a claim limitation. Claim 6 also provides for limitations “according to an embodiment.” If the Applicant would like particular embodiments examined, these should be presented in a proper Markush group, or in their own dependent claims. Claim 8 is indefinite because it is unclear what the range of an “effective dose” would comprise. There is nothing in the specification to suggest that the ordinary artisan can reasonably gauge the claimed treatment, with respect to an unclaimed dosage. Claim Rejections - 35 USC § 102 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 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 1-7 are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Zhi, et al (WO 2017/020786A1). Zhi states that Bacteroides fragilis can be used to treat diarrhea. See page 2 (of the translation), last paragraph. With respect to claim 1, Zhi teaches methods of treating diarrhea with B. fragilis. With respect to claim 2, Zhi teaches B. fragilis ZY-312. See page 1, 1st paragraph. Although Zhi provides for a different deposit number, the strain designation is the same. This would suggest that the claimed B. fragilis ZY-312 is likely identical to the B. fragilis ZY-312 described by Zhi. Barring evidence to the contrary, this is a reasonable assumption. With respect to claim 3, Zhi provides no limitations on the type of diarrhea, suggesting that it can include diarrhea from any cause. With respect to claims 4-6, Zhi teaches both living and freeze-dried cells. See page 10, “2. Bacterial preparation” section; page 12, last paragraph. With respect to claim 7, Zhi indicates that the composition can be provided as a food. See page 1, “Abstract” section. Claim Rejections - 35 USC § 102/103 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 8 and 9 are rejected under 35 U.S.C. 103 as being unpatentable over Zhi, et al (WO 2017/020786A1 [machine translation attached]). With respect to claim 8, Zhi teaches freeze-drying the composition. Although Zhi does not explicitly teach the claimed steps, these are generally routine steps for the processes of freeze-drying probiotic microbes. Therefore, if it can be shown that Zhi did not perform these steps, they would have been obvious to the ordinary artisan, since freeze-drying probiotic microbes is widely-used, and exceptionally well-known/predictable in the art. As such, Zhi either anticipates the claimed step, or the ordinary artisan would find the claimed step to be obvious over Zhi. With respect to claim 9, Zhi teaches pills, tablets, etc. See page 1, 1st paragraph. 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 provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claims 11-23 of copending Application No. 18/700/420 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because the two inventions provide for overlapping limitations. The copending application provides for a method of treating diarrhea with B. fragilis, wherein the diarrhea is caused by cancer treatment. The copending application is narrower, but wholly fits within the scope of the instant invention, because the instant invention provides for methods of treating diarrhea from any cause. As such, the copending application and the instant claim-set read upon each other, and provide for non-statutory double patenting. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to DAVID W BERKE-SCHLESSEL whose telephone number is (571)270-3643. The examiner can normally be reached M-F 8AM-5:30PM. 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, Melenie Gordon can be reached at 571-272-8037. 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. /DAVID W BERKE-SCHLESSEL/Primary Examiner, Art Unit 1651
Read full office action

Prosecution Timeline

Jul 25, 2024
Application Filed
Jul 16, 2026
Non-Final Rejection mailed — §102, §103, §112 (current)

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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
67%
Grant Probability
98%
With Interview (+31.9%)
2y 10m (~10m remaining)
Median Time to Grant
Low
PTA Risk
Based on 746 resolved cases by this examiner. Grant probability derived from career allowance rate.

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