Prosecution Insights
Last updated: July 17, 2026
Application No. 18/175,609

SURFACE COATING FOR DEGRADABLE MAGNESIUM AND MAGNESIUM ALLOYS AND METHOD FOR PREPARING THE SAME

Non-Final OA §103
Filed
Feb 28, 2023
Priority
Nov 18, 2021 — CN 202111370263.8 +1 more
Examiner
DICUS, TAMRA
Art Unit
1787
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Suzhou Innotech Medical Technology Co. Ltd.
OA Round
3 (Non-Final)
30%
Grant Probability
At Risk
3-4
OA Rounds
6m
Est. Remaining
51%
With Interview

Examiner Intelligence

Grants only 30% of cases
30%
Career Allowance Rate
191 granted / 638 resolved
-35.1% vs TC avg
Strong +22% interview lift
Without
With
+21.5%
Interview Lift
resolved cases with interview
Typical timeline
3y 11m
Avg Prosecution
35 currently pending
Career history
703
Total Applications
across all art units

Statute-Specific Performance

§103
93.1%
+53.1% vs TC avg
§102
3.3%
-36.7% vs TC avg
§112
1.6%
-38.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 638 resolved cases

Office Action

§103
DETAILED ACTION The present application, filed on or after March 16, 2013, is being examined under the first inventor to file provisions of the AIA . A request for continued examination under 37 CFR 1.114, including the fee set forth in 37 CFR 1.17(e), was filed in this application after final rejection. Since this application is eligible for continued examination under 37 CFR 1.114, and the fee set forth in 37 CFR 1.17(e) has been timely paid, the finality of the previous Office action has been withdrawn pursuant to 37 CFR 1.114. Applicant's submission filed on 03/23/26 has been entered. Applicants' arguments have been fully considered. Rejections and/or objections not reiterated from previous office actions are hereby withdrawn due to Applicant's amendments and/or arguments. The following rejections and/or objections are either reiterated or newly applied. 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. Claims 1-3 are rejected under 35 U.S.C. 103 as being unpatentable over Ke (CN101461964). Re claims 1-3, Ke discloses a surface coating for magnesium or magnesium alloy that comprises chemical conversion layer and ceramic layer [12]. The chemical conversion layer comprises phosphate-based conversion layers including magnesium phosphate [14, 27]. The conversion layer has a thickness of 10 nm to 1 mm [14]. The ceramic layer is made from hydroxyapatite and has a thickness of 1 micron to 10 mm [15]. The ratio of calcium to phosphorous in the hydroxyapatite is 1.67:1 [28]. In light of the overlap between the claimed surface coating and that disclosed by Ke, it would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to use a surface coating that is both disclosed by Ke and encompassed within the scope of the present claims and thereby arrive at the claimed invention. Response to Arguments Applicant’s arguments have been considered but are moot because the new ground of rejection and new reference. See the rejection above. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to TAMRA L. DICUS whose telephone number is (571)272-2022. The examiner can normally be reached M-F 8:00 am 4:00 pm. 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, Callie Shosho can be reached at 571-272-1123. 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. TAMRA L. DICUS Primary Examiner Art Unit 1787 /TAMRA L. DICUS/Primary Examiner, Art Unit 1787
Read full office action

Prosecution Timeline

Feb 28, 2023
Application Filed
May 28, 2025
Non-Final Rejection mailed — §103
Aug 27, 2025
Response Filed
Dec 22, 2025
Final Rejection mailed — §103
Mar 23, 2026
Request for Continued Examination
Mar 25, 2026
Response after Non-Final Action
Jun 17, 2026
Non-Final Rejection mailed — §103 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12674061
PAINT COMPOSITION
2y 7m to grant Granted Jul 07, 2026
Patent 12668705
ORGANIC-INORGANIC ADHESIVE COMPOSITION, AND GAS BARRIER FILM COMPRISING SAME
3y 4m to grant Granted Jun 30, 2026
Patent 12643311
FILMS, LAMINATES, AND METHODS OF MAKING COMPOSITIONS
2y 4m to grant Granted Jun 02, 2026
Patent 12637787
LAMINATED STRUCTURE AND METHOD FOR MANUFACTURING LAMINATED STRUCTURE
4y 3m to grant Granted May 26, 2026
Patent 12636854
MULTILAYER FILM
3y 10m to grant Granted May 26, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

3-4
Expected OA Rounds
30%
Grant Probability
51%
With Interview (+21.5%)
3y 11m (~6m remaining)
Median Time to Grant
High
PTA Risk
Based on 638 resolved cases by this examiner. Grant probability derived from career allowance rate.

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