Prosecution Insights
Last updated: July 17, 2026
Application No. 19/218,142

METHOD AND SYSTEM FOR DETERMINING THE SPEED OF SOUND IN A FLUID IN THE REGION OF A CARDIAC SUPPORT SYSTEM

Non-Final OA §DP
Filed
May 23, 2025
Priority
Jun 06, 2018 — DE 102018208899.3 +2 more
Examiner
CWERN, JONATHAN
Art Unit
3797
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Kardion GmbH
OA Round
1 (Non-Final)
51%
Grant Probability
Moderate
1-2
OA Rounds
2y 10m
Est. Remaining
86%
With Interview

Examiner Intelligence

Grants 51% of resolved cases
51%
Career Allowance Rate
411 granted / 813 resolved
-19.4% vs TC avg
Strong +35% interview lift
Without
With
+35.2%
Interview Lift
resolved cases with interview
Typical timeline
4y 0m
Avg Prosecution
36 currently pending
Career history
858
Total Applications
across all art units

Statute-Specific Performance

§101
0.7%
-39.3% vs TC avg
§103
88.3%
+48.3% vs TC avg
§102
3.1%
-36.9% vs TC avg
§112
6.0%
-34.0% vs TC avg
Black line = Tech Center average estimate • Based on career data from 813 resolved cases

Office Action

§DP
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 . Double Patenting The nonstatutory double patenting rejection is based on a judicially created doctrine grounded in public policy (a policy reflected in the statute) so as to prevent the unjustified or improper timewise extension of the “right to exclude” granted by a patent and to prevent possible harassment by multiple assignees. A nonstatutory double patenting rejection is appropriate where the conflicting claims are not identical, but at least one examined application claim is not patentably distinct from the reference claim(s) because the examined application claim is either anticipated by, or would have been obvious over, the reference claim(s). See, e.g., In re Berg, 140 F.3d 1428, 46 USPQ2d 1226 (Fed. Cir. 1998); In re Goodman, 11 F.3d 1046, 29 USPQ2d 2010 (Fed. Cir. 1993); In re Longi, 759 F.2d 887, 225 USPQ 645 (Fed. Cir. 1985); In re Van Ornum, 686 F.2d 937, 214 USPQ 761 (CCPA 1982); In re Vogel, 422 F.2d 438, 164 USPQ 619 (CCPA 1970); In re Thorington, 418 F.2d 528, 163 USPQ 644 (CCPA 1969). A timely filed terminal disclaimer in compliance with 37 CFR 1.321(c) or 1.321(d) may be used to overcome an actual or provisional rejection based on nonstatutory double patenting provided the reference application or patent either is shown to be commonly owned with the examined application, or claims an invention made as a result of activities undertaken within the scope of a joint research agreement. See MPEP § 717.02 for applications subject to examination under the first inventor to file provisions of the AIA as explained in MPEP § 2159. See MPEP § 2146 et seq. for applications not subject to examination under the first inventor to file provisions of the AIA . A terminal disclaimer must be signed in compliance with 37 CFR 1.321(b). The filing of a terminal disclaimer by itself is not a complete reply to a nonstatutory double patenting (NSDP) rejection. A complete reply requires that the terminal disclaimer be accompanied by a reply requesting reconsideration of the prior Office action. Even where the NSDP rejection is provisional the reply must be complete. See MPEP § 804, subsection I.B.1. For a reply to a non-final Office action, see 37 CFR 1.111(a). For a reply to final Office action, see 37 CFR 1.113(c). A request for reconsideration while not provided for in 37 CFR 1.113(c) may be filed after final for consideration. See MPEP §§ 706.07(e) and 714.13. The USPTO Internet website contains terminal disclaimer forms which may be used. Please visit www.uspto.gov/patent/patents-forms. The actual filing date of the application in which the form is filed determines what form (e.g., PTO/SB/25, PTO/SB/26, PTO/AIA /25, or PTO/AIA /26) should be used. A web-based eTerminal Disclaimer may be filled out completely online using web-screens. An eTerminal Disclaimer that meets all requirements is auto-processed and approved immediately upon submission. For more information about eTerminal Disclaimers, refer to www.uspto.gov/patents/apply/applying-online/eterminal-disclaimer. Claims 2-21 are rejected on the ground of nonstatutory double patenting as being unpatentable over claims 1-18 of U.S. Patent No. 12311160. Although the claims at issue are not identical, they are not patentably distinct from each other because the inventions are both directed to methods and systems for determining speed of sound in blood within a cannula of a cardiac support system. Claim 1 for example of the instant invention differs in that it is broader in scope than claim 1 of the patent. For example, the limitation of transmitting blood via a pump of the cardiac support system was omitted. However, the elimination of a step/element has been held to be an obvious modification to one of ordinary skill in the art (Ex parte Wu, 10 USPQ 2031, Bd. Pat. App. & Inter. 1989). Furthermore, it would be within the level of one of ordinary skill in the art to transmit blood via appropriate known blood transmission techniques/apparatus, such as via a pump. Claim 1 of the instant invention also differs in that it utilizes different wording in the sending step, for example by eliminating the word “protruding” in regards to the reflectors, however, the examiner notes that it would be within the level of one of ordinary skill in the art to arrange the reflectors such that they will be in the flow path of blood, so that the speed of sound in the blood may be accurately measured. Other minor differences in wording would be within the level of one of ordinary skill in the art to modify, in order to ultimately determine the speed of sound in blood based on the first reflected ultrasonic signal, the second reflected ultrasonic signal, and the different linear distances. Allowable Subject Matter Claims 2-21 would be allowable if rewritten or amended, or by filing terminal disclaimer, to overcome the double patenting rejection(s) set forth in this Office action. The following is a statement of reasons for the indication of allowable subject matter: The claims would be allowable for similar reasons as set forth in the parent application. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to JONATHAN CWERN whose telephone number is (571)270-1560. The examiner can normally be reached Monday - Friday, 8:00 am - 5:00 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, Christopher Koharski can be reached at (571) 272-7230. 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. /JONATHAN CWERN/Primary Examiner, Art Unit 3797
Read full office action

Prosecution Timeline

May 23, 2025
Application Filed
Jun 10, 2026
Non-Final Rejection mailed — §DP (current)

Precedent Cases

Applications granted by this same examiner with similar technology

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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
51%
Grant Probability
86%
With Interview (+35.2%)
4y 0m (~2y 10m remaining)
Median Time to Grant
Low
PTA Risk
Based on 813 resolved cases by this examiner. Grant probability derived from career allowance rate.

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