Prosecution Insights
Last updated: August 18, 2026
Application No. 18/430,854

MID-PRESSURE WATER SEPARATION FOR ENVIRONMENTAL CONTROL SYSTEM

Final Rejection §DP
Filed
Feb 02, 2024
Examiner
KEYWORTH, PETER
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
HAMILTON SUNDSTRAND Corporation
OA Round
2 (Final)
58%
Grant Probability
Moderate
3-4
OA Rounds
11m
Est. Remaining
82%
With Interview

Examiner Intelligence

Grants 58% of resolved cases
58%
Career Allowance Rate
461 granted / 791 resolved
-6.7% vs TC avg
Strong +24% interview lift
Without
With
+24.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 6m
Avg Prosecution
52 currently pending
Career history
836
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
52.8%
+12.8% vs TC avg
§102
13.3%
-26.7% vs TC avg
§112
29.4%
-10.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 791 resolved cases

Office Action

§DP
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 . Applicant’s Submission of a Response Applicant’s submission of a response was received on 6/23/2024. 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. Claim 1, 3, and 5-20 provisionally rejected on the ground of nonstatutory double patenting as being unpatentable over claim 1, 3-8, 10-11 and 16-19 of copending Application No. 18/430,859 (reference application). Although the claims at issue are not identical, they are not patentably distinct from each other because most limitations of claims 1, 3, and 5-6 are present in claims 1 and 6-8 of `859 and the remainder of limitations would be understood to be present based on the structure claimed in claim 11 of `859. Claim 7-8 would be understood to be present based on the structure claimed in claim 10 of `859. Claim 9 would have been an obvious matter of duplication of parts. Claims 10-12 merely recite the amount of twist of the spiral configuration and would be considered merely finding workable or optimum ranges. Claims 13-14 contain subject matter present in claims 16-17 of `859. Claims 14-18 discuss the vanes/flow channels can be of different length/shape which is considered in claims 3-5 of `859. Claims 19-20 contain subject matter present in claims 18-19 of `859. This is a provisional nonstatutory double patenting rejection because the patentably indistinct claims have not in fact been patented. It is noted that `859 currently has a notice of allowance issued and would soon become a nonstatutory double patenting rejection once the patent is issued. Further, the filing dates of the two applications is the same thereby also requiring this case to have a terminal disclaimer filed before allowance. Conclusion THIS ACTION IS MADE FINAL. Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to PETER KEYWORTH whose telephone number is (571)270-3479. The examiner can normally be reached 9-5 MT (11-7 ET). 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. /PETER KEYWORTH/Primary Examiner, Art Unit 1776
Read full office action

Prosecution Timeline

Feb 02, 2024
Application Filed
Mar 23, 2026
Non-Final Rejection mailed — §DP
Jun 23, 2026
Response Filed
Jul 15, 2026
Final Rejection mailed — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12692178
MOBILE CLARIFIER SYSTEM
3y 10m to grant Granted Jul 28, 2026
Patent 12668506
RECYCLING AUTOMOTIVE PHOSPHATE RINSE WATER STREAM
4y 10m to grant Granted Jun 30, 2026
Patent 12655047
PLUMBING SYSTEM AND METHOD FOR PURIFYING DRINKING WATER
3y 1m to grant Granted Jun 16, 2026
Patent 12623190
FABRICATION OF AQUAPORIN-BASED BIOMIMETIC MEMBRANE
4y 10m to grant Granted May 12, 2026
Patent 12611678
SEPARATION OF FLUIDS CONTAINING SOLIDS
4y 9m to grant Granted Apr 28, 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

3-4
Expected OA Rounds
58%
Grant Probability
82%
With Interview (+24.0%)
3y 6m (~11m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 791 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