Prosecution Insights
Last updated: April 19, 2026
Application No. 17/426,527

METHODS AND SYSTEMS FOR REDUCING A PATHOGEN POPULATION

Non-Final OA §112
Filed
Jul 28, 2021
Examiner
CLEVELAND, TIMOTHY C
Art Unit
1774
Tech Center
1700 — Chemical & Materials Engineering
Assignee
The Board Of Trustees Of The Leland Standford Junior University
OA Round
4 (Non-Final)
60%
Grant Probability
Moderate
4-5
OA Rounds
3y 0m
To Grant
77%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allow Rate
544 granted / 907 resolved
-5.0% vs TC avg
Strong +17% interview lift
Without
With
+17.0%
Interview Lift
resolved cases with interview
Typical timeline
3y 0m
Avg Prosecution
47 currently pending
Career history
954
Total Applications
across all art units

Statute-Specific Performance

§101
0.8%
-39.2% vs TC avg
§103
41.5%
+1.5% vs TC avg
§102
21.1%
-18.9% vs TC avg
§112
30.2%
-9.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 907 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 . Specification The use of the terms “Tween”® on page 16, lines 19-20 and “Luer-Lok” ® on page 20, lines 18-19, which are a trade name or a mark used in commerce, has been noted in this application. The terms should be accompanied by the generic terminology; furthermore each term should be capitalized wherever it appears or, where appropriate, include a proper symbol indicating use in commerce such as ™, SM , or ® following the term. Although the use of trade names and marks used in commerce (i.e., trademarks, service marks, certification marks, and collective marks) are permissible in patent applications, the proprietary nature of the marks should be respected and every effort made to prevent their use in any manner which might adversely affect their validity as commercial marks. Response to Arguments Applicant’s arguments, filed 15 October 2025, with respect to the prior art rejection have been fully considered and are persuasive. However, new rejections under §112 have been entered. Therefore, this action is made non-final. 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 1-8 and 16-19 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 enablement requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to enable one skilled in the art to which it pertains, or with which it is most nearly connected, to make and/or use the invention. Eatoo and Mishra (“Busting the myth of spontaneous formation of H2O2 at the air-water interface: contributions of the liquid-solid interface and dissolved oxygen exposed;” hereinafter “Eatoo”) disclose that the reduction of dissolved oxygen and oxidation of the solid surface result in the formation of hydrogen peroxide in sprayed water microdroplets. See the abstract and “Conclusion” section. Gallo et al. (“On the formation of hydrogen peroxide in water microdroplets;” hereinafter “Gallo”) disclose that hydrogen peroxide formation in water microdroplets was not observed and hypothesizes that the high regional ozone concentration in Santa Clara County during the years around the time the instant invention was made is the “primary reason being the H2O2 formation in those reports.” See “Discussion” and “Conclusion” sections. Chen and Williams (“Are Hydroxyl Radicals Spontaneously Generated in Unactivated Water Droplets?;" hereinafter “Chen”) disclose the spontaneous formation of hydroxyl radicals “do not originate form unactivated pure water droplets and these species must have been formed by an unrelation mechanism” such as “some form of energy transfer from the nebulization source.” See page 4. Therefore, the full scope of the invention is not enabled by the disclosure. The claims have a considerable breadth as the mechanism for generating hydrogen peroxide and the one or more reactive oxygen species has not been explicitly recited in claim 1, the starting component has not been expressly recited and “a source of pathogen” can be considered to be any living creature, solid surface or airspace. The prior art of reducing pathogens and generating hydrogen peroxide and reactive oxygen species is well understood and well developed. The level of one of ordinary skill in the art is high and the amount of predictability in the art is high. The amount of direction provided by the inventor is low as only a result has been provided and the chemical mechanisms in which the recited method utilizes has not been disclosed. A working example has not been provided as only the theory of a method of reducing a pathogen population has been disclosed. No specific apparatus or parameters for operation has been provided. From the above references, a vast quantity of experimentation would be needed to make or use the invention based on the content of the disclosure as the above references show that the invention was neither fully understood in a manner that one of ordinary skill in the art could make or use the claimed method at the time of invention. Eatoo makes clear that dissolved oxygen and surface oxidation are needed in order to result in the formation of hydrogen peroxide and radicals. Gallo discloses that high environment ozone levels are needed to result in hydrogen peroxide production. Chen discloses that an unrelated mechanism, such as energy transfer from the nebulization source, is needed in order to create hydroxyl radicals in pure water. Therefore, as it was not understood at the time of invention how the hydrogen peroxide and one or more reactive species were formed as evidenced by the above references, the original disclosure did not enable one skilled in the art to make or use the invention as claimed. Claims 1-8 and 16-19 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. In light of the references of Eatoo, Chen and Gallo discussed above, it is clear that the applicant did not possess the entire scope of the claimed invention as the method does not work without high environmental ozone concentrations, dissolved oxygen, oxidation of a solid surface, and/or some form of energy transfer from the nebulization source. As Applicant did not possess this knowledge or understanding at the time of filing the disclosure falls short of having possession of the claimed invention. Further, as disagreement regarding the mechanics of how the hydrogen peroxide and one or more reactive oxygen species form is still present and actively discussed the in scientific community as noted by the references of Eatoo, Chen and Gallo further evidence that possession of the entire scope of the claimed invention has still not been obtained. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to TIMOTHY C CLEVELAND whose telephone number is (571)270-5041. The examiner can normally be reached M-F 9:00-5:30. 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, Claire Wang can be reached at (571) 270-1051. 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. /TIMOTHY C CLEVELAND/Primary Examiner, Art Unit 1774
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Prosecution Timeline

Jul 28, 2021
Application Filed
Oct 01, 2024
Non-Final Rejection — §112
Dec 18, 2024
Response Filed
Feb 10, 2025
Final Rejection — §112
May 12, 2025
Response after Non-Final Action
Jun 30, 2025
Response after Non-Final Action
Jun 30, 2025
Request for Continued Examination
Jul 14, 2025
Non-Final Rejection — §112
Oct 15, 2025
Response Filed
Nov 21, 2025
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

4-5
Expected OA Rounds
60%
Grant Probability
77%
With Interview (+17.0%)
3y 0m
Median Time to Grant
High
PTA Risk
Based on 907 resolved cases by this examiner. Grant probability derived from career allow rate.

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