Prosecution Insights
Last updated: August 06, 2026
Application No. 18/257,546

NITRIFICATION INHIBITORS AND FORMULATIONS

Non-Final OA §103
Filed
Jun 14, 2023
Priority
Dec 17, 2020 — AU 2020904709 +1 more
Examiner
LANGEL, WAYNE A
Art Unit
1736
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Incitec Fertilisers Operations Pty Ltd.
OA Round
3 (Non-Final)
78%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
99%
With Interview

Examiner Intelligence

Grants 78% — above average
78%
Career Allowance Rate
1289 granted / 1641 resolved
+13.5% vs TC avg
Strong +23% interview lift
Without
With
+23.4%
Interview Lift
resolved cases with interview
Typical timeline
2y 4m
Avg Prosecution
49 currently pending
Career history
1680
Total Applications
across all art units

Statute-Specific Performance

§101
1.9%
-38.1% vs TC avg
§103
35.9%
-4.1% vs TC avg
§102
18.3%
-21.7% vs TC avg
§112
31.3%
-8.7% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1641 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 . The factual inquiries for establishing a background for determining obviousness under 35 U.S.C. 103 are summarized as follows: 1. Determining the scope and contents of the prior art. 2. Ascertaining the differences between the prior art and the claims at issue. 3. Resolving the level of ordinary skill in the pertinent art. 4. Considering objective evidence present in the application indicating obviousness or nonobviousness. Claim Rejections - 35 USC § 103 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. Claim 22 is rejected under 35 U.S.C. 103 as being unpatentable over McKnight et al ‘346, for the reasons given in the last Office Action. Response to Arguments Applicant’s argument, that the invention provides a formulation comprising anhydrous ammonia, a nitrification inhibitor, an aprotic solvent and a co-solvent comprising an ethanolamine compound, and that it has been found that by providing the aprotic solvent and the co-solvent of an ethanolamine compound, the nitrification inhibitor can be conveniently added to the anhydrous ammonia and remain stable without precipitation, is not convincing, since claim 22 does not require the presence of anhydrous ammonia. Allowable Subject Matter Claims 21 and 23-40 are allowed. 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. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to WAYNE A LANGEL whose telephone number is (571) 272-1353. The examiner can normally be reached Monday through Friday from 8:15 am to 4:15 pm. If attempts to reach the examiner by telephone are unsuccessful, the examiner’s supervisor, Anthony Zimmer can be reached at 571-270-3591. 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. /WAYNE A LANGEL/Primary Examiner, Art Unit 1736
Read full office action

Prosecution Timeline

Jun 14, 2023
Application Filed
Feb 04, 2026
Non-Final Rejection mailed — §103
Jun 04, 2026
Response Filed
Jul 02, 2026
Final Rejection mailed — §103
Jul 20, 2026
Response after Non-Final Action
Aug 04, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12698244
MICROBIAL CONSORTIA FOR SOIL IMPROVEMENT
3y 4m to grant Granted Aug 04, 2026
Patent 12698243
IMPROVED LIQUID FORMULATIONS OF UREASE INHIBITORS FOR FERTILIZERS
2y 3m to grant Granted Aug 04, 2026
Patent 12692204
Horticulture Additive
3y 8m to grant Granted Jul 28, 2026
Patent 12668492
APPARATUS FOR PRODUCING REDUCED SILICON NANOPOWDER USING LASER
2y 10m to grant Granted Jun 30, 2026
Patent 12668497
A Lithium Carbonate Production Process and Apparatus
3y 1m to grant Granted Jun 30, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
78%
Grant Probability
99%
With Interview (+23.4%)
2y 4m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 1641 resolved cases by this examiner. Grant probability derived from career allowance rate.

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