Prosecution Insights
Last updated: October 04, 2026
Application No. 18/847,516

NON-CONTACT OPTICAL METROLOGY SYSTEM TO MEASURE SIMULTANEOUSLY THE RELATIVE PISTON AND THE RELATIVE INCLINATION IN TWO AXES (TIP AND TILT) BETWEEN TWO REFLECTIVE SURFACES

Non-Final OA §112
Filed
Sep 16, 2024
Priority
Mar 16, 2022 — nonprovisional of PCTEP2022056812
Examiner
NUR, ABDULLAHI
Art Unit
2877
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
Idom S A U
OA Round
2 (Non-Final)
88%
Grant Probability
Favorable
2-3
OA Rounds
0m
Est. Remaining
94%
With Interview

Examiner Intelligence

Grants 88% — above average
88%
Career Allowance Rate
1028 granted / 1166 resolved
+20.2% vs TC avg
Moderate +6% lift
Without
With
+6.1%
Interview Lift
resolved cases with interview
Fast prosecutor
1y 11m
Avg Prosecution
13 currently pending
Career history
1172
Total Applications
across all art units

Statute-Specific Performance

§101
3.0%
-37.0% vs TC avg
§103
53.1%
+13.1% vs TC avg
§102
28.0%
-12.0% vs TC avg
§112
5.5%
-34.5% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1166 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 . Claim Rejections - 35 USC § 112 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 1-5, 7-11 is/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. As to claim 1, in the limitation “wherein said interferometer generates a fixed interference pattern modulated by an amplitude envelope, in which only fringes close to a region in the optical path difference in the two arms of the interferometer is zero, will be visible, when projecting said interference pattern, the magnitudes to be measured between the reference and target mirror, relative piston and the relative inclination in two axes, are decoupled, the three magnitudes measured are extracted based on . . .”. there are a couple of issues here, one of which exists throughout the specification and claims and does not appear to be addressed, and one of which appears to be part of the amended limitation. First, the phrase “relative piston” throughout the spec and claims is indefinite. I am guessing that this is supposed to be position, because the specification states measuring the difference in relative height (piston), but I don’t know how “relative piston” would work in the claim given what is being measured and the fact that there are no actual pistons in the application. That really should be “relative position” rather than “relative piston”, as there is no definition of “piston” that fits here that would make that phrase appropriate (given the lack of pistons as mentioned earlier). The second issue is that the limitation is still idiomatic and unclear overall. What I think the applicant is trying to claim is that when the interferometer generates a fixed interference pattern that is only visible when the optical path difference between the arms in the interferometer is zero the interference pattern, and then the interference pattern is “projected”, and the magnitudes to be measured, which are the relative position and the relative inclination in each of the two axes, are somehow decoupled. But even if I can guess at what the claim likely means, I would not find that limitation definite as there are still too many questions about the language there. So, in summary, “relative piston” needs to be addressed throughout the specification and the claims, and I would consider the limitation at issue here indefinite even if I can take a stab at what the applicant is trying to claim. Still the recitation of ‘first output light beam,’ in line 12 appears to be interchangeable to the ‘said first light beam,’ in line 14. Claims 2-5, 7-11 depend on claim 1. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ABDULLAHI NUR whose telephone number is (571)270-1298. The examiner can normally be reached on M-F, 9am to 6pm. 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, Kara Geisel, can be reached on 571-272-2416. The fax phone number for the organization where this application or proceeding is assigned is 571-273-8300. Information regarding the status of an application may be obtained from the Patent Application Information Retrieval (PAIR) system. Status information for published applications may be obtained from either Private PAIR or Public PAIR. Status information for unpublished applications is available through Private PAIR only. For more information about the PAIR system, see http://pair direct.uspto.gov. Should you have questions on access to the Private PAIR system, contact the Electronic Business Center (EBC) at 866-217-9197 (toll-free). If you would like assistance from a USPTO Customer Service Representative or access to the automated information system, call 800-786-9199 (IN USA OR CANADA) or 571-272-1000. /ABDULLAHI NUR/Primary Examiner, Art Unit 2886
Read full office action

Prosecution Timeline

Sep 16, 2024
Application Filed
Feb 17, 2026
Non-Final Rejection mailed — §112
Apr 30, 2026
Interview Requested
May 12, 2026
Applicant Interview (Telephonic)
May 12, 2026
Examiner Interview Summary
May 29, 2026
Response Filed
Aug 04, 2026
Non-Final Rejection mailed — §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

2-3
Expected OA Rounds
88%
Grant Probability
94%
With Interview (+6.1%)
1y 11m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1166 resolved cases by this examiner. Grant probability derived from career allowance rate.

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