Prosecution Insights
Last updated: April 19, 2026
Application No. 17/181,604

AIR PURIFICATION SYSTEM

Final Rejection §112
Filed
Feb 22, 2021
Examiner
SPAMER, DONALD R
Art Unit
1799
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Clean Air Zone Inc.
OA Round
6 (Final)
60%
Grant Probability
Moderate
7-8
OA Rounds
2y 11m
To Grant
91%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allow Rate
327 granted / 548 resolved
-5.3% vs TC avg
Strong +31% interview lift
Without
With
+31.2%
Interview Lift
resolved cases with interview
Typical timeline
2y 11m
Avg Prosecution
37 currently pending
Career history
585
Total Applications
across all art units

Statute-Specific Performance

§101
1.1%
-38.9% vs TC avg
§103
48.8%
+8.8% vs TC avg
§102
14.1%
-25.9% vs TC avg
§112
29.3%
-10.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 548 resolved cases

Office Action

§112
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 amendments filed 12/02/2025 are acknowledged. Claims 1-20 are acknowledged. Claim Rejections - 35 USC § 112 The following is a quotation of the first paragraph of 35 U.S.C. 112(a): (a) IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. The following is a quotation of the first paragraph of pre-AIA 35 U.S.C. 112: The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor of carrying out his invention. Claims 1-15 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. With regards to claim 1, the specification does not support that the channel cover forms a “solid liquid impervious channel”. While the specification discusses the channel delivering liquid, it is not specified that it is impervious to liquid. It is also not inherent that a channel that delivers liquid is liquid impervious. It could still be leaky along the way or function like a soaker hose. Additionally, whether the walls of the channel are solid or hollow is not specified or indicated in the specification. Dependent claims are rejected for the same reasons as the claims from which they depend. 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 16-20 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 16 still recites “said bottom section” in the second to last line. It is unclear if this is the same or different from the previously introduced “said bottom portion”. Claim 18 is indefinite. Two raceways are already introduced in claim 16. Now a bearing is recited as having at least one raceway. It is not clear if this is the same or different raceway or how many raceways are recited. Also, it is not clear as to which of the now introduced raceways “said raceway” refers. With regards to claim 19, it is not clear as to which of the now introduced raceways “said raceway” refers. Dependent claims are rejected for the same reasons as the claims from which they depend. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). 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 DONALD R SPAMER whose telephone number is (571)272-3197. The examiner can normally be reached Monday to Friday from 9-5. 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 Marcheschi can be reached at (571)272-1374. 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. /DONALD R SPAMER/Primary Examiner, Art Unit 1799
Read full office action

Prosecution Timeline

Feb 22, 2021
Application Filed
Aug 26, 2023
Non-Final Rejection — §112
Nov 22, 2023
Response Filed
Feb 23, 2024
Final Rejection — §112
May 29, 2024
Request for Continued Examination
Jun 03, 2024
Response after Non-Final Action
Aug 07, 2024
Non-Final Rejection — §112
Nov 13, 2024
Response Filed
Jan 25, 2025
Final Rejection — §112
Apr 30, 2025
Request for Continued Examination
May 01, 2025
Response after Non-Final Action
May 30, 2025
Non-Final Rejection — §112
Nov 19, 2025
Examiner Interview Summary
Nov 19, 2025
Applicant Interview (Telephonic)
Dec 02, 2025
Response Filed
Mar 18, 2026
Final Rejection — §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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METHOD TO DECONTAMINATE SOLID SURFACE
2y 5m to grant Granted Mar 24, 2026
Patent 12576177
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2y 5m to grant Granted Mar 17, 2026
Patent 12575509
MOVABLE APPARATUS WITH AUTOMATIC/AUTONOMOUS OPERATION SLIDABLE ALONG PRE-ESTABLISHED PATHS AMONG ROWS OF VINEYARDS, FOR THE ANTI-BACTERIAL AND FUNGICIDE TREATMENT OF THE SAME VINEYARDS
2y 5m to grant Granted Mar 17, 2026
Patent 12576179
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2y 5m to grant Granted Mar 17, 2026
Patent 12557840
Portable Scent Dispensing Ashtray
2y 5m to grant Granted Feb 24, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

7-8
Expected OA Rounds
60%
Grant Probability
91%
With Interview (+31.2%)
2y 11m
Median Time to Grant
High
PTA Risk
Based on 548 resolved cases by this examiner. Grant probability derived from career allow rate.

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