Prosecution Insights
Last updated: April 19, 2026
Application No. 18/572,380

IMAGE COMPRESSION AND ASSOCIATED COLOR APPROXIMATION

Non-Final OA §102
Filed
Dec 20, 2023
Examiner
LU, ZHIYU
Art Unit
2665
Tech Center
2600 — Communications
Assignee
Polar Hpc Solutions Limited
OA Round
1 (Non-Final)
49%
Grant Probability
Moderate
1-2
OA Rounds
3y 8m
To Grant
63%
With Interview

Examiner Intelligence

Grants 49% of resolved cases
49%
Career Allow Rate
374 granted / 759 resolved
-12.7% vs TC avg
Moderate +14% lift
Without
With
+13.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 8m
Avg Prosecution
57 currently pending
Career history
816
Total Applications
across all art units

Statute-Specific Performance

§101
2.9%
-37.1% vs TC avg
§103
66.6%
+26.6% vs TC avg
§102
11.8%
-28.2% vs TC avg
§112
17.0%
-23.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 759 resolved cases

Office Action

§102
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 § 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. Claim(s) 21 is/are rejected under 35 U.S.C. 102(a)(1) as anticipated by or, in the alternative, under 35 U.S.C. 103 as obvious over Matsuoka (US2010/0183223). To claim 21, Matsuoka teach a computer-implemented method for compressing a digital image, the method being performed by one or more computer systems and comprising: receiving a digital image with a plurality of color types, wherein the digital image is to be compressed (paragraph 0012); receiving an approximation function and coefficients associated therewith, wherein the approximation function approximates a color value of a one color type of the plurality of color types based on at least two or more other color types of the plurality of color types, wherein the approximation is independent of pixel positions of the digital image (paragraphs 0033-0035, 0042-0044, wherein it is interpreted that pixel position plays no role in calculation as nothing relevant is disclosed); compressing the digital image by replacing color values of the one color type within the digital image with the approximation function and the selected set of coefficients associated with the one color type (paragraphs 0009, 0017, 0237); and transmitting and/or storing the compressed digital image (paragraphs 0090, 0097, 0250-0251, 0259). Allowable Subject Matter Claims 1-20 are allowed. The following is an examiner’s statement of reasons for allowance: no prior art has been found to fully teach the specifically claimed computer implemented method for image compression. 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 ZHIYU LU whose telephone number is (571)272-2837. The examiner can normally be reached Weekdays: 8:30AM - 5:00PM. 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, Stephen R Koziol can be reached at (408) 918-7630. 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. ZHIYU . LU Primary Examiner Art Unit 2669 /ZHIYU LU/Primary Examiner, Art Unit 2665 November 19, 2025
Read full office action

Prosecution Timeline

Dec 20, 2023
Application Filed
Nov 19, 2025
Non-Final Rejection — §102 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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Patent 12581142
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2y 5m to grant Granted Mar 17, 2026
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
49%
Grant Probability
63%
With Interview (+13.9%)
3y 8m
Median Time to Grant
Low
PTA Risk
Based on 759 resolved cases by this examiner. Grant probability derived from career allow rate.

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