Prosecution Insights
Last updated: May 04, 2026
Application No. 18/365,957

AIRFLOW SPLITTER, AIRFLOW SPLITTING ASSEMBLY, AND HOMOGENEOUS FLOW PRODUCING DEVICE

Non-Final OA §112
Filed
Aug 04, 2023
Priority
Aug 09, 2022 — CN 202210949655.8
Examiner
RUDDIE, ELLIOT S
Art Unit
3785
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Resvent Medical Technology Co. Ltd.
OA Round
1 (Non-Final)
65%
Grant Probability
Favorable
1-2
OA Rounds
9m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 65% — above average
65%
Career Allowance Rate
304 granted / 465 resolved
-4.6% vs TC avg
Strong +42% interview lift
Without
With
+42.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
38 currently pending
Career history
503
Total Applications
across all art units

Statute-Specific Performance

§101
2.3%
-37.7% vs TC avg
§103
48.5%
+8.5% vs TC avg
§102
17.4%
-22.6% vs TC avg
§112
25.0%
-15.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 465 resolved cases

Office Action

§112
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 . Priority Acknowledgement is made to Applicant’s claim to priority to Foreign App. No. CN20221094965538 filed August 9, 2022. Status of Claims This Office Action is responsive to the preliminary amendment filed on September 26, 2023. As directed by the amendment: claim 18 has been amended. Thus, claims 1-20 are presently pending in this application. Claim Objections Claims 1, 7, 9, 13, and 17 are objected to because of the following informalities: Claim 1 recites "the at least two splitting members sleeved sequentially, in each two adjacent splitting members, the large aperture end of one splitting member being located in the small aperture end of the other splitting member,", ln 7-9 should read --the at least two splitting members sleeved sequentially, such that, in each two adjacent splitting members, the large aperture end of one splitting member being located in the small aperture end of the other splitting member,--; Claim 7 recites “wherein a plurality of auxiliary flow pathways are form between the inner splitting member and the outer splitting member.”, ln 1-2 should read --wherein a plurality of auxiliary flow pathways are formed between the inner splitting member and the outer splitting member.-- Claim 9 recites “the second splitting member; ;an annular gap”, ln 12 should read --the second splitting member; an annular gap--; Claim 13 recites “of the flow pathway; .”, ln 4 should read --of the flow pathway.--; Claim 17 recites "the at least two splitting members sleeved sequentially, in each two adjacent splitting members, the large aperture end of one splitting member being located in the small aperture end of the other splitting member,", ln 14-16 should read --the at least two splitting members sleeved sequentially, such that, in each two adjacent splitting members, the large aperture end of one splitting member being located in the small aperture end of the other splitting member,-- Appropriate correction is required. 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. Claim 9, and claims 10-16 by dependency, 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. Claim 9 recites "and the splitting member", ln 7, there is insufficient antecedent basis for this limitation in the claim. It is unclear whether the splitting member is intended to reference the second splitting member or introduce a new element. For the purpose of this Office Action the limitation "and the splitting member" has been interpreted as --and the second splitting member--. Allowable Subject Matter Claim 9 would be allowable if rewritten or amended to overcome the rejection(s) under 35 U.S.C. 112(b) or 35 U.S.C. 112 (pre-AIA ), 2nd paragraph, set forth in this Office action. The following is an examiner’s statement of reasons for allowance: prior art of Inoshiri et al. (U.S. Pat. No. 5,937,938; hereinafter: “Inoshiri”) an airflow splitter, comprising: an inlet (A, Fig. A annotated below); an outlet (B, Fig. A annotated below); and at least two splitting members (C, Fig. A annotated below), each splitting member comprising a small aperture end (D, Fig. A annotated below)and a large aperture end (E, Fig. A annotated below) opposite to each other (Fig. 5), the small aperture ends of all the splitting members facing the inlet (Fig. 5; col 4, ln 37-52), and the large aperture ends of all the splitting members facing the outlet (Fig. 5; col 4, ln 37-52); a flow pathway defined between the small aperture ends and the large aperture ends (F, Fig. A annotated below), and an annular gap (G, Fig. A annotated below) being formed between each two adjacent splitting members, and the annular gap being communicated with the flow pathway (Fig. 5; col 4, ln 37-52). PNG media_image1.png 451 651 media_image1.png Greyscale Figure A, Adapted from Figure 5 of Inoshiri. Prior art of Künzelmann (U.S. Pub. No. 2022/0128070) discloses an airflow splitting assembly, comprising: an airflow splitter (11, 11’; Fig. 2, 3), the airflow splitter comprising: an inlet (31; Fig. 2, 3); an outlet (32; Fig. 2, 3); a first splitting member (27; Fig. 2); and a second splitting member (17; Fig. 2) sleeved outside of the first splitting member (Fig. 2; ¶¶ 0035-0042); wherein each of the first splitting member and the second splitting member having a small aperture end (A, Fig. B annotated below) and a large aperture end (B, Fig. B annotated below) opposite to each other, the small aperture ends of the first splitting member and the second splitting member facing the inlet (Fig. 2; ¶¶ 0035-0042), and the large aperture ends of the first splitting member and the second splitting member facing the outlet (Fig. 2; ¶¶ 0035-0042); a flow pathway (25, 29; Fig. 2, 3) defined between the small aperture ends and the large aperture ends (¶¶ 0035-0042); an annular gap (C, Fig. B annotated below) being formed between the first splitting member and the second splitting member, and the annular gap communicated with the flow pathway (Fig. 2; ¶¶ 0035-0042); and a strainer (57; Fig. 3), arranged at the outlet of the airflow splitter to enable the gas to pass through (¶¶ 0044, 0045). PNG media_image2.png 554 468 media_image2.png Greyscale Figure B, Adapted from Figure 2 of Künzelmann. Prior art of Inoshiri and Künzelmann alone or in combination fail to disclose or render obvious the air flow splitter: wherein the at least two splitting members sleeved sequentially, such that, in each two adjacent splitting members, the large aperture end of one splitting member being located in the small aperture end of the other splitting member, as recited in independent claims 1 and 17. where the large aperture end of the first splitting member is located in the small aperture end of the second splitting member, as recited in independent claim 9. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ELLIOT S RUDDIE whose telephone number is (571)272-7634. The examiner can normally be reached M-F usually 9-7 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, Kendra Carter can be reached at (571) 272-9034. 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. /ELLIOT S RUDDIE/Primary Patent Examiner, Art Unit 3785
Read full office action

Prosecution Timeline

Aug 04, 2023
Application Filed
Apr 14, 2026
Examiner Interview (Telephonic)
Apr 16, 2026
Non-Final Rejection — §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
65%
Grant Probability
99%
With Interview (+42.5%)
3y 6m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 465 resolved cases by this examiner. Grant probability derived from career allowance rate.

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