Prosecution Insights
Last updated: August 16, 2026
Application No. 18/288,808

ZOOM OPTICAL SYSTEM, OPTICAL APPARATUS AND METHOD FOR MANUFACTURING THE ZOOM OPTICAL SYSTEM

Non-Final OA §102
Filed
Jun 17, 2024
Priority
Jun 15, 2021 — JP 2021-099589 +1 more
Examiner
DUDEK, JAMES A
Art Unit
2871
Tech Center
2800 — Semiconductors & Electrical Systems
Assignee
NIKON Corporation
OA Round
1 (Non-Final)
82%
Grant Probability
Favorable
1-2
OA Rounds
0m
Est. Remaining
85%
With Interview

Examiner Intelligence

Grants 82% — above average
82%
Career Allowance Rate
1122 granted / 1367 resolved
+14.1% vs TC avg
Minimal +3% lift
Without
With
+3.1%
Interview Lift
resolved cases with interview
Typical timeline
2y 2m
Avg Prosecution
12 currently pending
Career history
1374
Total Applications
across all art units

Statute-Specific Performance

§101
0.2%
-39.8% vs TC avg
§103
59.7%
+19.7% vs TC avg
§102
29.2%
-10.8% vs TC avg
§112
5.7%
-34.3% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1367 resolved cases

Office Action

§102
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 . Election/Restrictions Applicant’s election without traverse of Group I in the reply filed on 6/16/26 is acknowledged. Claim Rejections - 35 USC § 102 In the event the determination of the status of the application as subject to AIA 35 U.S.C. 102 and 103 (or as subject to pre-AIA 35 U.S.C. 102 and 103) is incorrect, any correction of the statutory basis (i.e., changing from AIA to pre-AIA ) for the rejection will not be considered a new ground of rejection if the prior art relied upon, and the rationale supporting the rejection, would be the same under either status. The following is a quotation of the appropriate paragraphs of 35 U.S.C. 102 that form the basis for the rejections under this section made in this Office action: A person shall be entitled to a patent unless – (a)(1) the claimed invention was patented, described in a printed publication, or in public use, on sale, or otherwise available to the public before the effective filing date of the claimed invention. Claim(s) 1-10, 26-33, and 35 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by JP 2020122823 A (OBIKANE YASUHIKO et al.) PNG media_image1.png 496 370 media_image1.png Greyscale PNG media_image2.png 128 376 media_image2.png Greyscale Per claims 1, 33, and 35, Obikane teaches a zoom optical system comprising: a first lens group having positive refractive power [G1]; a second lens group having negative refractive power [G2]; a third lens group having positive refractive power [G3]; a fourth lens group having negative refractive power [G4]; and a fifth lens group having negative refractive power [G5], which are aligned in order from an object side along an optical axis, wherein when zooming is performed, intervals between neighboring lens groups are changed [see figure 21], the fourth lens group is a focusing lens group which moves along the optical axis when focusing is performed [see the specification operation section: “ More preferably, both or one of the fourth lens group and the fifth lens group or a part thereof is used as a focus group, and the focus group is moved along the optical axis at the time of focusing so that the distance from infinity is increased”], and the following conditional expression is satisfied:, 0.11 < f4/f5 < 0.70 where f4 denotes a focal length of the fourth lens group, and f5 denotes a focal length of the fifth lens group [see table 24: -18.192/-97.508 = 0.187]. Regarding method claim 35, the method step are merely a recitation of the structure and thus inherent/anticipate by the structure of claim 1 its dependent claims. Per claim 2, Obikane teaches the zoom optical system according to Claim 1, wherein the following conditional expression is satisfied: 0.01 < (-f4) /f3 < 5.00 where f3 denotes a focal length of the third lens group [18.192/13.661 = 1.33]. Per claim 3, Obikane teaches the zoom optical system according to Claim 1, wherein the following conditional expression is satisfied: T 0.01 < f3/ (-f5) < 1.00 where f3 denotes a focal length of the third lens group [13.661/97.508 = 0.140]. Per claim 4, Obikane teaches the zoom optical system according to claim 1, wherein the following conditional expression is satisfied: - 0.01 < f3/ (-f45t) < 2.00 where f3 denotes a focal length of the third lens group, and f45t denotes a combined focal length of the fourth lens group and the fifth lens group in a telephoto end state [13.64/14.55 - 0.94]. Per claim 5, Obikane teaches the zoom optical system according to claim 1, wherein the following conditional expression is satisfied: T 0.01 < B5t/B5w < 2.00 where ß5t denotes a lateral magnification of the fifth lens group in a telephoto end state, and ß5w denotes a lateral magnification of the fifth lens group in a wide angle end state [see Table 25: 5t/5w 1.478/1.197 = 1.23]. Per claim 6, Obikane teaches the zoom optical system according to claim 1, wherein the following conditional expression is satisfied: T 0.01 < Bfw/fw < 0.95 where Bfw denotes a back focal length of the zoom optical system in a wide angle end state, and fw denotes a focal length of the zoom optical system in the wide angle end state [14.503/18.301 = 0.79]. Per claim 7, Obikane teaches the zoom optical system according to claim 1, wherein the fifth lens group consists of two lenses [see figure 21]. Per claim 8, Obikane teaches the zoom optical system according to claim 1, wherein the third lens group has a lens which satisfies the following conditional expression L 75.00 < v3L where v3L denotes an Abbe number of the lens in the third lens group [see table 21: 81.61]. Per claim 9, Obikane teaches the zoom optical system according to claim 1, wherein the third lens group has, in a part of the third lens group, a vibration proof group which is movable to have a displacement component in a direction perpendicular to the optical axis [VC is the anti-vibration group]. Per claim 10, Obikane teaches the zoom optical system according to Claim 9, wherein the following conditional expression is satisfied: 0.01 < f3/fVR < 2.00 where f3 denotes a focal length of the third lens group, and fVR denotes a focal length of the vibration proof group [13.64/38.01 = 0.36]. Per claim 26, Obikane teaches the zoom optical system according to claim 9, wherein the following conditional expression is satisfied: 0.01 < fVR/ (-fF) < 2.50 where fVR denotes a focal length of the vibration proof group, and fF denotes a focal length of the focusing lens group [38.01/18.192 = 2.09]. Per claim 27, Obikane teaches the zoom optical system according to claim 9, wherein the vibration proof group consists of two lenses [see figure 21]. Per claim 28, Obikane teaches the zoom optical system according to claim 1, wherein the following conditional expression is satisfied: 0.01 < (-f2) /f1 < 1.00 where f1 denotes a focal length of the first lens group, and f2 denotes a focal length of the second lens group [-f2/fl = 15.02/82.0 0.18]. Per claim 29, Obikane teaches the zoom optical system according to claim 1, wherein the following conditional expression is satisfied: T 0.01 < TLt/ft < 2.00 where TLt denotes an entire length of the zoom optical system in a telephoto end state, and ft denotes a focal length of the zoom optical system in the telephoto end state [TLt/R = 129.999/102.674 = 1.27]. Per claim 30, Obikane teaches the zoom optical system according to claim 1, wherein the following conditional expression is satisfied: 0.01 < BFt/BFw < 2.00 where BFt denotes a lateral magnification of the focusing lens group in a telephoto end state, and ßFW denotes a lateral magnification of the focusing lens group in a wide angle end state BFt/BFw 3.037/2.191 = 1.38]. Per claim 31, Obikane teaches the zoom optical system according to claim 1, wherein the focusing lens group consists of two lenses [see figure 21]. Per claim 32, Obikane teaches the zoom optical system according to claim 1, wherein the first lens group has a lens which satisfies the following conditional expression: 75.00 < v1L where v1L denotes an Abbe number of the lens in the first lens group [81.61]. Any inquiry concerning this communication or earlier communications from the examiner should be directed to JAMES A DUDEK whose telephone number is (571)272-2290. The examiner can normally be reached Monday-Thursday 6:30-4:30 MT. 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, Jennifer Carruth can be reached at 571-272-9791. 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. /JAMES A DUDEK/ Primary Examiner, Art Unit 2871
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Prosecution Timeline

Jun 17, 2024
Application Filed
Jul 21, 2026
Non-Final Rejection mailed — §102 (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

1-2
Expected OA Rounds
82%
Grant Probability
85%
With Interview (+3.1%)
2y 2m (~0m remaining)
Median Time to Grant
Low
PTA Risk
Based on 1367 resolved cases by this examiner. Grant probability derived from career allowance rate.

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