Prosecution Insights
Last updated: April 19, 2026
Application No. 18/293,448

APPARATUS AND METHOD FOR SIMULTANEOUSLY TREATING DIFFERENT FLUCTUATING GAS FLOWS

Non-Final OA §102§112
Filed
Jan 30, 2024
Examiner
LAWRENCE JR, FRANK M
Art Unit
1776
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Evonik Operations GmbH
OA Round
1 (Non-Final)
84%
Grant Probability
Favorable
1-2
OA Rounds
2y 6m
To Grant
99%
With Interview

Examiner Intelligence

Grants 84% — above average
84%
Career Allow Rate
1172 granted / 1399 resolved
+18.8% vs TC avg
Strong +20% interview lift
Without
With
+19.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 6m
Avg Prosecution
34 currently pending
Career history
1433
Total Applications
across all art units

Statute-Specific Performance

§101
0.3%
-39.7% vs TC avg
§103
31.7%
-8.3% vs TC avg
§102
30.3%
-9.7% vs TC avg
§112
24.3%
-15.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1399 resolved cases

Office Action

§102 §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 . Specification The disclosure is objected to because of the following informalities: The reference to specific claims on page 2 should be removed because the final claims can be renumbered, amended or canceled. A brief description of the drawings is missing. Appropriate correction is required. Drawings The drawings are objected to as failing to comply with 37 CFR 1.84(p)(5) because they do not include the following reference sign(s) mentioned in the description: 31 and 33. Corrected drawing sheets in compliance with 37 CFR 1.121(d) are required in reply to the Office action to avoid abandonment of the application. Any amended replacement drawing sheet should include all of the figures appearing on the immediate prior version of the sheet, even if only one figure is being amended. Each drawing sheet submitted after the filing date of an application must be labeled in the top margin as either “Replacement Sheet” or “New Sheet” pursuant to 37 CFR 1.121(d). If the changes are not accepted by the examiner, the applicant will be notified and informed of any required corrective action in the next Office action. The objection to the drawings will not be held in abeyance. 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 33-52 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 33 recites the limitation "the attachment points" in lines 41 and 43. There is insufficient antecedent basis for this limitation in the claim. The first instance may be changed to “attachment points.” Claim 42 recites the limitation "the pipe conduit" in lines 9 and 11. There is insufficient antecedent basis for this limitation in the claim. This can be changed to “a pipe conduit” in the first instance. Claims 34-41 and 43-52 are rejected for depending from an indefinite parent claim. 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. Claim(s) 33-36, 43-45 and 48-52 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Li et al. (5,919,285). Li et al. ‘285 teach a gas separation device comprising first and second feed conduits (74,75) that transport gases having different compositions, a membrane separation stage comprising a block of three membrane separation units (M1, MS, MN) connected in parallel, and a gas distributor comprising valved connection conduits that each connect gas inlets of two adjacent membrane separation units to one another, wherein the first and second feed gas conduits are connected as spatially separate sites to a distributor conduit such that two branches are disposed between the attachment points and the feed streams flow towards each other within the block. Each membrane separation unit has a gas inlet connected to the feed conduits, a separation membrane, a retentate outlet connected to retentate conduits (79, 80, 81) and a main retentate conduit, and a permeate outlet connected to permeate conduits (76, 78) and a mixed permeate vent conduit (78). Regarding claim 43, the method limitations do not structurally limit the claim in a way that distinguishes over the prior device, which can be considered to already have extended or reduced conduit sections. Allowable Subject Matter Claims 37-42, 46 and 47 would be allowable if rewritten 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 and to include all of the limitations of the base claim and any intervening claims. Conclusion The prior art made of record and not relied upon is considered pertinent to applicant's disclosure. The additional references listed on the attached PTO-892 form disclose membrane gas separation arrangements. Any inquiry concerning this communication or earlier communications from the examiner should be directed to FRANK LAWRENCE whose telephone number is (571)272-1161. The examiner can normally be reached Mon-Fri 8:30am-7pm. 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, Jennifer Dieterle can be reached at 571-270-7872. 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. /FRANK M LAWRENCE JR/Primary Examiner, Art Unit 1776 fl
Read full office action

Prosecution Timeline

Jan 30, 2024
Application Filed
Feb 18, 2026
Non-Final Rejection — §102, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12601073
H2 DRYER FOR POWER PLANT USING ELECTROLYZER
2y 5m to grant Granted Apr 14, 2026
Patent 12594523
MEMBRANE CAPTURE OF CO2 FROM REFINERY EMISSIONS
2y 5m to grant Granted Apr 07, 2026
Patent 12595960
ADSORBER, PURIFICATION SYSTEM, AND PURIFICATION METHOD
2y 5m to grant Granted Apr 07, 2026
Patent 12592404
HUMIDIFIER
2y 5m to grant Granted Mar 31, 2026
Patent 12582940
MEMBRANE PRECONCENTRATION OF CARBON DIOXIDE FROM EXHAUST GAS SOURCES
2y 5m to grant Granted Mar 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

AI Strategy Recommendation

Get an AI-powered prosecution strategy using examiner precedents, rejection analysis, and claim mapping.
Powered by AI — typically takes 5-10 seconds

Prosecution Projections

1-2
Expected OA Rounds
84%
Grant Probability
99%
With Interview (+19.8%)
2y 6m
Median Time to Grant
Low
PTA Risk
Based on 1399 resolved cases by this examiner. Grant probability derived from career allow 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