Prosecution Insights
Last updated: October 04, 2026
Application No. 15/733,316

METHOD FOR PREPARING SYNTHETIC PHYLLOSILICATES

Final Rejection §112
Filed
Jun 25, 2020
Priority
Dec 29, 2017 — EU 17306972.5 +1 more
Examiner
CORALLO, CATRIONA MARY
Art Unit
1732
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Centre National de la Recherche Scientifique
OA Round
6 (Final)
67%
Grant Probability
Favorable
7-8
OA Rounds
0m
Est. Remaining
80%
With Interview

Examiner Intelligence

Grants 67% — above average
67%
Career Allowance Rate
69 granted / 103 resolved
+2.0% vs TC avg
Moderate +13% lift
Without
With
+12.9%
Interview Lift
resolved cases with interview
Typical timeline
3y 3m
Avg Prosecution
26 currently pending
Career history
128
Total Applications
across all art units

Statute-Specific Performance

§103
61.9%
+21.9% vs TC avg
§102
8.8%
-31.2% vs TC avg
§112
23.6%
-16.4% vs TC avg
Black line = Tech Center average estimate • Based on career data from 103 resolved cases

Office Action

§112
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 Newly submitted claims 23 and 24 are directed to an invention that lacks unity with the invention originally claimed for the following reasons: Even though the inventions of all the groups require the technical feature of a synthetic phyllosilicate, this technical feature is not a special technical feature as it does not make a contribution over the prior art Koichi et al. (JP H06246175 A) (Koichi). Koichi teaches a swelling layered compound that may be phyllosilicate minerals such as synthetic mica (Koichi, p. 2, Paragraph 7). Since applicant has received an action on the merits for the originally presented invention, this invention has been constructively elected by original presentation for prosecution on the merits. Accordingly, claims 23 and 24 are withdrawn from consideration as being directed to a nonelected invention. See 37 CFR 1.142(b) and MPEP § 821.03. To preserve a right to petition, the reply to this action must distinctly and specifically point out supposed errors in the restriction requirement. Otherwise, the election shall be treated as a final election without traverse. Traversal must be timely. Failure to timely traverse the requirement will result in the loss of right to petition under 37 CFR 1.144. If claims are subsequently added, applicant must indicate which of the subsequently added claims are readable upon the elected invention. Should applicant traverse on the ground that the inventions are not patentably distinct, applicant should submit evidence or identify such evidence now of record showing the inventions to be obvious variants or clearly admit on the record that this is the case. In either instance, if the examiner finds one of the inventions unpatentable over the prior art, the evidence or admission may be used in a rejection under 35 U.S.C. 103 or pre-AIA 35 U.S.C. 103(a) of the other invention. Claim Rejections - 35 USC § 112 Claims 1-2, 5-7, 9-13, 16-17, and 21-22 are rejected under 35 U.S.C. 112(a) or 35 U.S.C. 112 (pre-AIA ), first paragraph, as failing to comply with the written description requirement. The claim(s) contains subject matter which was not described in the specification in such a way as to reasonably convey to one skilled in the relevant art that the inventor or a joint inventor, or for applications subject to pre-AIA 35 U.S.C. 112, the inventor(s), at the time the application was filed, had possession of the claimed invention. Claim 1 recites, “A method for drying a non-swelling synthetic phyllosilicate, the method comprising: providing a mixture of the non-swelling synthetic phyllosilicate” (emphasis added) and “wherein the non-swelling phyllosilicate is selected from talc, pyrophyllites, kaolinites, serpentines, chlorites, and mixtures of one or more thereof” (emphasis added). However, there is only support for a synthetic talc composition comprising: “swelling TOT-TOT (tetrahedron-octahedron-tetrahedron) interlayer particles, is formed by interlayering between: at least one non-swelling mineral phase formed by a stack of elementary laminae of the 2/1 phyllogermanosilicate type and having the chemical formula –(SixGe1-x)4M3O10(OH)2–, and at least one swelling mineral phase…” (emphasis added) Specification, p. 7, lines 11-32; p. 8, line 1 And support for, “In certain embodiments, the synthetic mineral particles of said talc composition are phyllosilicated mineral particles displaying at least one non-swelling phase formed by a stack of elementary laminae of the 2/1 phyllogermanosilicate type and having the chemical formula (SixGe1-x)4M3O10(OH)2, and wherein x represents a real number of the interval [0; 1], and M denotes at least one divalent metal and has the chemical formula Mgy(1)COy(2)Zny(3)Cuy(4)Mny(5)Fey(6)Niy(7)Cry(8); each y(i) representing a real number of the interval [0; 1]” (emphasis added) Specification, p. 16, lines 7-13 Therefore, there is no support for drying a non-swelling synthetic phyllosilicate without the swelling phases, wherein the non-swelling phyllosilicate is any form of talc. And there is no support for non-swelling phyllosilicates being pyrophyllites, kaolinites, serpentines, chlorites, and mixtures thereof. There is only support for a non-swelling phyllosilicate being a talc composition displaying at least one non-swelling phase having the chemical formula (SixGe1-x)4M3O10(OH)2, and wherein x represents a real number of the interval [0; 1], and M denotes at least one divalent metal and has the chemical formula Mgy(1)COy(2)Zny(3)Cuy(4)Mny(5)Fey(6)Niy(7)Cry(8); each y(i) representing a real number of the interval [0; 1]. Regarding dependent claims 2, 5-7, 9-13, 16-17, and 21-22, these claims do not remedy the deficiencies of parent claim 1 noted above, and are rejected for the same rationale. Response to Arguments In response to applicant’s amendments, a new 35 U.S.C. 112(a) new matter rejection is necessitated as set forth above. Conclusion Applicant's amendment necessitated the new ground(s) of rejection presented in this Office action. Accordingly, THIS ACTION IS MADE FINAL. See MPEP § 706.07(a). Applicant is reminded of the extension of time policy as set forth in 37 CFR 1.136(a). A shortened statutory period for reply to this final action is set to expire THREE MONTHS from the mailing date of this action. In the event a first reply is filed within TWO MONTHS of the mailing date of this final action and the advisory action is not mailed until after the end of the THREE-MONTH shortened statutory period, then the shortened statutory period will expire on the date the advisory action is mailed, and any nonprovisional extension fee (37 CFR 1.17(a)) pursuant to 37 CFR 1.136(a) will be calculated from the mailing date of the advisory action. In no event, however, will the statutory period for reply expire later than SIX MONTHS from the mailing date of this final action. Any inquiry concerning this communication or earlier communications from the examiner should be directed to Catriona Corallo whose telephone number is (571)272-8957. The examiner can normally be reached Monday-Friday, 8am-5pm. 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, Ching-Yiu Fung can be reached at (571)270-5713. 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. /C.M.C./Examiner, Art Unit 1732 /CORIS FUNG/Supervisory Patent Examiner, Art Unit 1732
Read full office action

Prosecution Timeline

Show 9 earlier events
Aug 12, 2024
Non-Final Rejection mailed — §112
Feb 12, 2025
Response Filed
Apr 23, 2025
Final Rejection mailed — §112
Oct 22, 2025
Request for Continued Examination
Oct 23, 2025
Response after Non-Final Action
Dec 09, 2025
Non-Final Rejection mailed — §112
Jun 08, 2026
Response Filed
Sep 25, 2026
Final Rejection mailed — §112 (current)

Precedent Cases

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THREE-DIMENSIONAL PRINTING WITH FOOD CONTACT COMPLIANT AGENTS
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Patent 12654152
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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

7-8
Expected OA Rounds
67%
Grant Probability
80%
With Interview (+12.9%)
3y 3m (~0m remaining)
Median Time to Grant
High
PTA Risk
Based on 103 resolved cases by this examiner. Grant probability derived from career allowance rate.

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