Prosecution Insights
Browse Companies Examiners Firms Draft Your Response
Office Actions › Yamaguchi University › 18315455
Last updated: April 19, 2026
Application No. 18/315,455

GAS ANALYZER

Final Rejection
Filed
May 10, 2023
Examiner
NIA, FATEMEH ESFANDIARI
Art Unit
2855
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Yamaguchi University
OA Round
4 (Final)
74%
Grant Probability
Favorable
5-6
OA Rounds
2y 7m
To Grant
96%
With Interview

Interview Optional

— +22.7% interview lift. This examiner has a relatively high allow rate; a written response may suffice.
Based on 215 resolved cases, 2023–2026

Examiner Intelligence

NIA, FATEMEH ESFANDIARI View full profile →
Grants 74% — above average
74%
Career Allow Rate
158 granted / 215 resolved
+5.5% vs TC avg
Strong +23% interview lift
Without
With
+22.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
50 currently pending
Career history
265
Total Applications
across all art units

Statute-Specific Performance

§101
2.5%
-37.5% vs TC avg
§103
50.5%
+10.5% vs TC avg
§102
14.8%
-25.2% vs TC avg
§112
27.6%
-12.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 215 resolved cases

Prosecution Timeline

May 10, 2023
Application Filed
Oct 18, 2024
Non-Final Rejection
Jan 23, 2025
Response Filed
Feb 18, 2025
Final Rejection
May 19, 2025
Request for Continued Examination
May 20, 2025
Response after Non-Final Action
Jun 24, 2025
Non-Final Rejection
Aug 29, 2025
Response Filed
Sep 19, 2025
Final Rejection
Oct 20, 2025
Interview Requested
Oct 31, 2025
Examiner Interview Summary

Precedent Cases

Applications granted by this same examiner with similar technology

19/085,345
Patent 12591962
METHOD OF EXAMINING A PARTICULATE SUBSTANCE COMPRISING INORGANIC PARTICLES, COMPRISING DETERMINING AT LEAST ONE BINDER QUALITY ASSOCIATED PROPERTY
2y 5m to grant Granted Mar 31, 2026
18/953,386
Patent 12584874
GAS MEASURING DEVICE AND GAS MEASURING PROCESS FOR A TARGET GAS WITH IMPROVED COMPENSATION OF AN AMBIENT CONDITION
2y 5m to grant Granted Mar 24, 2026
17/438,667
Patent 12578255
DETERMINING A VAPOR PRESSURE OF A FLUID IN A METER ASSEMBLY
2y 5m to grant Granted Mar 17, 2026
17/551,978
Patent 12566148
HYDROGEN SULFIDE SENSOR AND ASSOCIATED METHODS
2y 5m to grant Granted Mar 03, 2026
18/731,644
Patent 12560522
APPARATUS FOR MEASURING PROPERTIES OF PARTICLES IN A SOLUTION AND RELATED METHODS
2y 5m to grant Granted Feb 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

5-6
Expected OA Rounds
74%
Grant Probability
96%
With Interview (+22.7%)
2y 7m
Median Time to Grant
High
PTA Risk
Based on 215 resolved cases by this examiner. Grant probability derived from career allow rate.

Ready to respond to this office action?

IP Author drafts your complete OA response — amendments, arguments, and claim strategy — in minutes, not days.

Start Drafting Your Response →

Data sourced from USPTO Patent File Wrapper (daily) and Office Action Archive (weekly). Analysis generated by IP Author.

Data: USPTO Patent File Wrapper (daily) • Office Action Archive (weekly) • 89M+ prosecution events

© 2026 IP Author — Browse Office Actions • Examiners • Companies • Firms

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