Prosecution Insights
Last updated: October 01, 2026
Application No. 18/712,755

DIFFUSER FOR DIFFUSING A GAS FLOW WITHIN A STACK OF BLANKS AND ASSOCIATED ASSEMBLIES

Non-Final OA §103
Filed
May 23, 2024
Priority
Nov 25, 2021 — FR 2112490 +1 more
Examiner
WAN, DEMING
Art Unit
Tech Center
Assignee
Safran S.A.
OA Round
1 (Non-Final)
76%
Grant Probability
Favorable
1-2
OA Rounds
1m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 76% — above average
76%
Career Allowance Rate
720 granted / 942 resolved
+16.4% vs TC avg
Strong +42% interview lift
Without
With
+42.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
34 currently pending
Career history
961
Total Applications
across all art units

Statute-Specific Performance

§101
0.5%
-39.5% vs TC avg
§103
51.3%
+11.3% vs TC avg
§102
19.4%
-20.6% vs TC avg
§112
25.1%
-14.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 942 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 (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. 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, 3, 4, 6 are rejected under 35 U.S.C. 103 as being unpatentable over US Patent 4,938,422 to Koves. In Reference to Claim 1 Koves discloses a diffuser for diffusing a gas flow within a stack (Fig. 3, the Office considers that each stage is a blank as annotated by the examiner) of blanks of parts based on carbon/carbon composite impregnated with a sol-gel type solution, the sol- gel type solution including comprising a solvent and one or more compounds, the gas flow enabling the solvent to be evaporated by heat transfer, each blank having a central through hole (Fig. 3, annotated by the examiner), the central holes passing through blanks of the stack of blanks forming a central well (Fig. 3, annotated by the examiner) of the stack of blanks, the diffuser including comprising a plurality of diffusion vanes (Fig. 3, annotated by the examiner) each including comprising a central end (Fig. 3, annotated by the examiner) and a peripheral end (Fig. 3, annotated by the examiner), the diffusion vanes extending from a central cavity (as showed in Fig. 3) of the diffuser to the a periphery of the diffuser, each diffusion vane (Fig. 3, annotated by the examiner) having a central through opening (Fig. 3, annotated by the examiner), the central through openings of the diffusion vanes forming the open central cavity of the diffuser, in order to form a gas inlet open upwardly when the diffuser is installed so as to be associated with the stack of blanks (16), the a section of the central cavity decreasing from the gas inlet, said diffusion vanes being adapted to extend at least partially into the central well when the diffuser is installed so as to be associated with the stack of blanks, the diffusion vanes being adapted to diffuse and homogenize homogenize over the entire height of the stack of blanks the gas flow flowing from the central well through the stack of blanks. Koves does not teach the diffuser is for diffusing the sol-gel type solution. The Office considers that diffusing the sol-gel type solution is a functional limitation of the recited structure. The Office considers “to provide negative pressure feedback on fluid entering the cavity" as functional language. The use of the function language only requires that apparatus is capable of performing the function, and does not add any specific structural limitations to the apparatus. Since Koves’s design has a stepped opening passaged in the middle section of the distributor, it would meet the functional limitation. PNG media_image1.png 604 560 media_image1.png Greyscale In Reference to Claim 3 Koves discloses the diffuser is configured so that, when the diffuser is installed so as to be associated with the stack of blanks (Fig. 3, annotated by the examiner), the peripheral end (Fig. 3, annotated by the examiner) of each diffusion vane faces an internal wall (As showed in Fig. 3) of a blank, so that the gas flow is directed towards the a periphery between the blanks. In Reference to Claim 4 Koves discloses a deflector (Fig. 3, 22) adapted to extend at least partially above the stack of blanks (16) when the diffuser is installed so as to be associated with the stack of blanks, in order to guide the gas towards the central well (Fig. 3, annotated by the examiner) of the stack of blanks, for example towards the central cavity of the diffuser. In Reference to Claim 6 Koves discloses the diffuser according to claim 1 -a base (Fig. 1, 14) configured so that the diffuser rests on the base when installed so as to be associated with the stack of blanks Allowable Subject Matter Claims 2, 5 and 7 are objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to DEMING WAN whose telephone number is (571)272-1410. The examiner can normally be reached Mon-Thur: 8 am to 6 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, Michael Hoang can be reached at 57122726460. 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. DEMING . WAN Examiner Art Unit 3762 /DEMING WAN/Primary Examiner, Art Unit 3762 9/22/26
Read full office action

Prosecution Timeline

May 23, 2024
Application Filed
Sep 24, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12735830
CLOTHING TREATMENT APPARATUS
4y 0m to grant Granted Sep 15, 2026
Patent 12728446
FLUID VAPOR MIXING AND DELIVERY SYSTEM
3y 11m to grant Granted Sep 08, 2026
Patent 12729909
ELECTRODE SHEET OVEN DRYING APPARATUS, BATTERY PRODUCTION DEVICE, AND ELECTRODE SHEET OVEN DRYING METHOD
3y 2m to grant Granted Sep 08, 2026
Patent 12716652
DEVICE FOR DRYING SEMICONDUCTOR SUBSTRATES
4y 2m to grant Granted Aug 25, 2026
Patent 12721083
SUBSTRATE PROCESSING APPARATUS AND SUBSTRATE PROCESSING METHOD
3y 11m to grant Granted Aug 25, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

1-2
Expected OA Rounds
76%
Grant Probability
99%
With Interview (+42.4%)
2y 6m (~1m remaining)
Median Time to Grant
Low
PTA Risk
Based on 942 resolved cases by this examiner. Grant probability derived from career allowance 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