Prosecution Insights
Last updated: April 19, 2026
Application No. 18/041,266

AN AUTOMATED CENTRIFUGATION DEVICE AND METHODS TO CONTINUOUSLY SEPARATE COMPONENTS FROM DIFFERENT MIXTURES

Final Rejection §112
Filed
Feb 10, 2023
Examiner
MENON, KRISHNAN S
Art Unit
1777
Tech Center
1700 — Chemical & Materials Engineering
Assignee
Athem LLC
OA Round
4 (Final)
60%
Grant Probability
Moderate
5-6
OA Rounds
3y 2m
To Grant
71%
With Interview

Examiner Intelligence

Grants 60% of resolved cases
60%
Career Allow Rate
879 granted / 1475 resolved
-5.4% vs TC avg
Moderate +12% lift
Without
With
+11.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
72 currently pending
Career history
1547
Total Applications
across all art units

Statute-Specific Performance

§101
1.7%
-38.3% vs TC avg
§103
31.5%
-8.5% vs TC avg
§102
29.4%
-10.6% vs TC avg
§112
26.4%
-13.6% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1475 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 . 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. Claim 34 is 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. Claim 34 recites the inlet as having two different positions for clock wise and counter clockwise rotations, which is unclear. As shown in the annotated figures copied herein, the direction of rotation does not appear to change the position of the inlet with respect to the outlets in the base, unless applicant has a different embodiment – that is, a device with a different structure for the inlet and outlet. The significance of these limitations is unclear to the examiner. If this is how the claimed device is to be oriented in its receptacle in the larger apparatus, that is not made clear in the disclosure. Otherwise, changing the direction of rotation in the figure 3 would not change the position of the inlet with respect to the first outlet. PNG media_image1.png 442 409 media_image1.png Greyscale PNG media_image2.png 299 276 media_image2.png Greyscale The following is a quotation of the first paragraph of 35 U.S.C. 112(a): IN GENERAL.—The specification shall contain a written description of the invention, and of the manner and process of making and using it, in such full, clear, concise, and exact terms as to enable any person skilled in the art to which it pertains, or with which it is most nearly connected, to make and use the same, and shall set forth the best mode contemplated by the inventor or joint inventor of carrying out the invention. Claims 1-3, 6-12, 26-32 and 34 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. The newly added limitation in claim 1, “the device further comprises … a second pump coupled to the first and second outlets” and “the second pump is configured to continuously flow separated materials from the complex starting material out of the chamber through the first and second outlets.” As shown in the 112(b) rejection above, if the applicant intents to claim a different embodiment of the device, such an embodiment is not disclosed. Arguments in response to this rejection: the citations from the disclosure in the argument does not show the objected limitations. The examiner further considered the disclosure in its entirety, but found no disclosure that continuously pumps the complex starting material through pump 1 to the inlet and continuously flow the separated materials (two separate streams) through pump 2. The two outlets must be rejoined to have this configuration. Also the examiner observes a flaw in this limitation. The separated stream, if pumped together, wouldn’t they get mixed up again? Conclusion THIS ACTION IS MADE FINAL. 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 KRISHNAN S MENON whose telephone number is (571)272-1143. The examiner can normally be reached Flexible, but generally Monday-Friday: 8:00AM-4:30PM. 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, Prem C Singh can be reached at 571-272-6381. 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. /KRISHNAN S MENON/ Primary Examiner, Art Unit 1777
Read full office action

Prosecution Timeline

Feb 10, 2023
Application Filed
Feb 10, 2023
Response after Non-Final Action
Jun 30, 2025
Non-Final Rejection — §112
Aug 29, 2025
Examiner Interview Summary
Aug 29, 2025
Applicant Interview (Telephonic)
Sep 23, 2025
Response Filed
Oct 07, 2025
Final Rejection — §112
Oct 29, 2025
Response after Non-Final Action
Dec 09, 2025
Request for Continued Examination
Dec 11, 2025
Response after Non-Final Action
Jan 26, 2026
Non-Final Rejection — §112
Mar 24, 2026
Response Filed
Apr 08, 2026
Final Rejection — §112 (current)

Precedent Cases

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Study what changed to get past this examiner. Based on 5 most recent grants.

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Prosecution Projections

5-6
Expected OA Rounds
60%
Grant Probability
71%
With Interview (+11.7%)
3y 2m
Median Time to Grant
High
PTA Risk
Based on 1475 resolved cases by this examiner. Grant probability derived from career allow rate.

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