Prosecution Insights
Last updated: October 02, 2026
Application No. 18/959,919

OPTICAL SYSTEM

Non-Final OA §DOUBLEPATENT
Filed
Nov 26, 2024
Priority
Mar 08, 2017 — provisional 62/468,579 +4 more
Examiner
GAGNON, GRANT A
Art Unit
Tech Center
Assignee
3M Innovative Properties Company
OA Round
1 (Non-Final)
83%
Grant Probability
Favorable
1-2
OA Rounds
9m
Est. Remaining
91%
With Interview

Examiner Intelligence

Grants 83% — above average
83%
Career Allowance Rate
395 granted / 477 resolved
+22.8% vs TC avg
Moderate +8% lift
Without
With
+7.8%
Interview Lift
resolved cases with interview
Typical timeline
2y 7m
Avg Prosecution
39 currently pending
Career history
509
Total Applications
across all art units

Statute-Specific Performance

§101
1.2%
-38.8% vs TC avg
§103
44.4%
+4.4% vs TC avg
§102
42.6%
+2.6% vs TC avg
§112
5.1%
-34.9% vs TC avg
Black line = Tech Center average estimate • Based on career data from 477 resolved cases

Office Action

§DOUBLEPATENT
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 . Information Disclosure Statement The IDS filed to date have been considered. Double Patenting Claim 1 is rejected on the ground of nonstatutory double patenting as being unpatentable over claim 7 of U.S. Patent No. 11630290. Although the claims at issue are not identical: 18959919 11630290 An optical system comprising: a first lens comprising a glass and a second lens comprising a plastic; a plurality of optical lenses comprising at least one first lens comprising a glass and at least one second lens comprising a plastic; a partial reflector disposed on and conforming to a curved major surface of the first lens and having an average optical reflectance of at least 30% in a predetermined wavelength range; a partial reflector disposed on and conforming to a curved major surface of at least one first lens and having an average optical reflectance of at least 30% in a predetermined wavelength range; a reflective polarizer disposed on and conforming to a curved major surface of the second lens; a reflective polarizer disposed on and conforming to a curved major surface of the at least one second lens, wherein, a light ray propagating along an optical axis of the optical system, passes through the first and second lenses, the partial reflector and the reflective polarizer without being substantially refracted, a light ray propagating along the optical axis passing through the plurality of optical lenses, the partial reflector, the reflective polarizer, and the first retarder layer without being substantially refracted, and wherein for a cone of light that is incident on the optical system from an object having a spatial frequency of about 70 line pairs per millimeter and comprises a chief ray that after passing through the optical system makes an angle of about 20 degrees with the optical axis, such that for a cone of light incident on the optical system from an object comprising a spatial frequency of about 70 line pairs per millimeter filling the exit pupil with a chief ray of the cone of light passing through a center of the opening of the exit pupil and making an angle (0) of about 20 degrees with the optical axis, a modulation transfer function (MTF) of the optical system is greater than about 0.2. a modulation transfer function (MTF) of the optical system is greater than about 0.2. The claims are not patentably distinct from each other because the claim limitations represent a broader scope than those limitations of the aforementioned patent as the instant invention does not teach the limitations: “the reflective polarizer; substantially reflecting light having a first polarization state and substantially transmitting, a light having an orthogonal secondary polarization state in the predetermined wavelength range; a first retarder layer disposed on and conforming to a major surface of plurality of optical lenses between the reflective polarizer and the partial reflector; and an exit pupil defining an opening therein,” and “the optical system having an optical axis, a light ray propagating along the optical axis passing through the plurality of optical lenses.” Claim 2 is rejected on the ground of nonstatutory double patenting as being unpatentable over claim 1 of U.S. Patent No. 11630290. Although the claims at issue are not identical, they are not patentably distinct from each other because the claim limitations represent a broader scope than those limitations of the aforementioned patent. Claim 3 is rejected on the ground of nonstatutory double patenting as being unpatentable over claim 14 of U.S. Patent No. 11630290. Although the claims at issue are not identical, they are not patentably distinct from each other because the claim limitations represent a broader scope than those limitations of the aforementioned patent. Allowable Subject Matter Claims 4 and 5 are objected to as being dependent upon a rejected base claim but would be allowable if rewritten to be included in the independent claim including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: With regards to claims 4 and 5, the claim limitations include materials like borosilicate BK7 glass, a lanthanum crown LAK34, a lanthanum flint LAF7 glass, a flint F2 glass, a dense flint SF2, a lanthanum dense flint LASF45, a fluorophosphate FPL51 and a fluorophosphate FPL55 glass (claim 4) and a polymethylmethacrylate (PMMA), a polystyrene, a polyvinyl alcohol, and a polycarbonate (claim 5) which would help to distinguish the current claim set from that of the currently double patented claims of US 11630290. As such, due to these limitations if they were to be included in the independent claim the instant invention would be in a state of allowance. Any comments considered necessary by applicant must be submitted no later than the payment of the issue fee and, to avoid processing delays, should preferably accompany the issue fee. Such submissions should be clearly labeled “Comments on Statement of Reasons for Allowance.” Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to GRANT A GAGNON whose telephone number is (571)270-0642. The examiner can normally be reached M-F 7:30-5:30. 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, Bumsuk Won can be reached at (571) 272-2713. 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. /GRANT A GAGNON/Examiner, Art Unit 2872 /BUMSUK WON/Supervisory Patent Examiner, Art Unit 2872
Read full office action

Prosecution Timeline

Nov 26, 2024
Application Filed
Aug 27, 2026
Non-Final Rejection mailed — §DOUBLEPATENT (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

1-2
Expected OA Rounds
83%
Grant Probability
91%
With Interview (+7.8%)
2y 7m (~9m remaining)
Median Time to Grant
Low
PTA Risk
Based on 477 resolved cases by this examiner. Grant probability derived from career allowance rate.

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