Prosecution Insights
Last updated: April 19, 2026
Application No. 18/685,438

OPTICAL TRANSMITTING APPARATUS, AND CONTROL METHOD

Non-Final OA §102§103§112
Filed
Feb 21, 2024
Examiner
SHAMEEM, ASIF ISLAM
Art Unit
2634
Tech Center
2600 — Communications
Assignee
Nippon Telegraph and Telephone Corporation
OA Round
1 (Non-Final)
87%
Grant Probability
Favorable
1-2
OA Rounds
2y 8m
To Grant
99%
With Interview

Examiner Intelligence

Grants 87% — above average
87%
Career Allow Rate
13 granted / 15 resolved
+24.7% vs TC avg
Strong +17% interview lift
Without
With
+16.7%
Interview Lift
resolved cases with interview
Typical timeline
2y 8m
Avg Prosecution
18 currently pending
Career history
33
Total Applications
across all art units

Statute-Specific Performance

§103
52.1%
+12.1% vs TC avg
§102
24.5%
-15.5% vs TC avg
§112
19.2%
-20.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 15 resolved cases

Office Action

§102 §103 §112
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 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. Claim 1 and 3 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. Regarding Claim 1, Claim 1 recites the limitation "synchronously add the signals modulated by the plurality of phase modulators" in Lines 8-9. There is insufficient antecedent basis for this limitation in the claim. Regarding Claim 3, Claim 3 recites the limitation "output from the same laser diode" in Line 2. There is insufficient antecedent basis for this limitation in the claim. Claim Rejections - 35 USC § 102 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. (a)(2) the claimed invention was described in a patent issued under section 151, or in an application for patent published or deemed published under section 122(b), in which the patent or application, as the case may be, names another inventor and was effectively filed before the effective filing date of the claimed invention. Claim 7 is rejected under 35 U.S.C. 102(a)(2) as being anticipated by 9. Consider Claim 7, Fuse discloses a method of controlling an optical transmission apparatus, the method comprising: a division step of dividing a frequency-multiplexed input signal into signals with a plurality of bands (Figure 21, element 1112 frequency multiplexed signal); a plurality of phase modulation steps of performing phase modulation on signals with the allocated bands divided by the division step (Figure 21, elements 1051 and 1052 both receive signals with allocated bands for phase modulation); and a synchronous addition step of performing synchronous addition on each of the signals modulated by the plurality of phase modulation steps (Figure 21, element 106 where modulated signals are combined together). 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. 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. Claims 1, 3-4, and 6 are rejected under 35 U.S.C. 103 as being unpatentable over Fuse, and further in view of Wood (US 9960846). Consider Claim 1, Fuse discloses divide a frequency-multiplexed input signal into signals with a plurality of bands (Figure 21, element 1112 where band divider divides frequency multiplexed signal); and synchronously add the signals modulated by the plurality of phase modulators (Figure 21, element 106 where modulated signals are combined together); and a plurality of phase modulators that are allocated to the plurality of bands and perform phase modulation on the signals with the allocated bands (Figure 21, elements 1051 and 1052 both receive signals with allocated bands for phase modulation) but does not disclose an optical transmission apparatus comprising: a processor; and a storage medium having computer program instructions stored thereon, when executed by the processor. However, Wood discloses an optical transmission apparatus comprising: a processor (Figure 3, element 300); and a storage medium having computer program instructions stored thereon, when executed by the processor (Column 5, Lines 20-22 where memory unit can include processor executable code). Therefore, it would have been obvious to one of ordinary skill in the art before theeffective filing date of applicant’s claimed invention to have incorporated the teachingsof Wood into Fuse to implement signal processing to reduce noise of signals. Consider Claim 3, Fuse discloses the optical transmission apparatus according to claim 1, wherein an output from the same laser diode is input to each of the plurality of phase modulators (Figure 21, where an output from light source element 101 will go into angle modulator elements 1051 and 1052). Therefore, it would have been obvious to one of ordinary skill in the art before theeffective filing date of applicant’s claimed invention to have incorporated the teachingsof Wood into Fuse to implement signal processing to reduce noise of signals. Consider Claim 4, Fuses discloses the optical transmission apparatus according to claim 1, further comprising an intensity modulator configured to perform intensity modulation on a signal (Figure 21, element 104 perform intensity modulation on signal). Therefore, it would have been obvious to one of ordinary skill in the art before theeffective filing date of applicant’s claimed invention to have incorporated the teachingsof Wood into Fuse to implement signal processing to reduce noise of signals. Consider Claim 6, Fuse discloses the optical transmission apparatus according to claim 1, wherein the signal is able to be demodulated by a reception apparatus having received the signal (Figure 27C and Column 2, Lines 19-21, where angle modulated signal gets demodulated after being obtained by photodetector element 1007). Therefore, it would have been obvious to one of ordinary skill in the art before theeffective filing date of applicant’s claimed invention to have incorporated the teachingsof Wood into Fuse to implement signal processing to reduce noise of signals. Claim 2 is rejected under 35 U.S.C. 103 as being unpatentable over Fuse in view of Wood, and further in view of Fuse (US 5541757; hereinafter "Fuse 2"). Consider Claim 2, Fuse and Wood do not disclose the limitations of this claim. However, “Fuse 2” discloses the optical transmission apparatus according to claim 1, wherein the input signal is a multichannel video signal (Figure 1, element 1001). Therefore, it would have been obvious to one of ordinary skill in the art before theeffective filing date of applicant’s claimed invention to have incorporated the teachingsof “Fuse 2” into Fuse and Wood to increase bandwidth. Claim 5 is rejected under 35 U.S.C. 103 as being unpatentable over Fuse in view of Wood, and further in view of Kawahara (US 11979226). Consider Claim 5, Fuse and Wood do not disclose the limitations of this claim. However, Kawahara discloses the optical transmission apparatus according to claim 1, wherein the plurality of bands are determined in accordance with a distortion characteristic of each band (Column 3, Lines 38-45, where wavelength bands can be used to measure loss. Therefore, it would have been obvious to one of ordinary skill in the art before theeffective filing date of applicant’s claimed invention to have incorporated the teachingsof Kawahara into Fuse and Wood to better identify different frequency bands Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to ASIF SHAMEEM whose telephone number is (571)272-6576. The examiner can normally be reached Monday - Friday 8:00 AM EST-5:00 PM EST. 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, KENNETH VANDERPUYE can be reached at (571) 272-3078. 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. /ASIF SHAMEEM/Examiner, Art Unit 2634 /KENNETH N VANDERPUYE/Supervisory Patent Examiner, Art Unit 2634
Read full office action

Prosecution Timeline

Feb 21, 2024
Application Filed
Dec 22, 2025
Non-Final Rejection — §102, §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12578617
Optical Comb Generation Device
2y 5m to grant Granted Mar 17, 2026
Patent 12578468
Optical Comb Generation Device
2y 5m to grant Granted Mar 17, 2026
Patent 12578613
Optical Frequency Comb Generator Control Device
2y 5m to grant Granted Mar 17, 2026
Patent 12556299
OPTICAL SYSTEM WITH OFFLOADED OPTICAL COMPONENTS
2y 5m to grant Granted Feb 17, 2026
Patent 12537618
METHODS AND APPARATUSES FOR MULTIPLEXING AND DEMULTIPLEXING OPTICAL SIGNALS CONFIGURED TO SUPPRESS THE FOUR-WAVE MIXING EFFECT
2y 5m to grant Granted Jan 27, 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

1-2
Expected OA Rounds
87%
Grant Probability
99%
With Interview (+16.7%)
2y 8m
Median Time to Grant
Low
PTA Risk
Based on 15 resolved cases by this examiner. Grant probability derived from career allow rate.

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