Prosecution Insights
Last updated: August 14, 2026
Application No. 19/031,525

DEVICES AND METHODS FOR TREATING LOWER EXTREMITY VASCULATURE

Non-Final OA §102§103
Filed
Jan 18, 2025
Priority
Jun 19, 2014 — provisional 62/014,554 +5 more
Examiner
LAUER, CHRISTINA C
Art Unit
Tech Center
Assignee
Limflow GmbH
OA Round
1 (Non-Final)
68%
Grant Probability
Favorable
1-2
OA Rounds
2y 2m
Est. Remaining
84%
With Interview

Examiner Intelligence

Grants 68% — above average
68%
Career Allowance Rate
462 granted / 675 resolved
+8.4% vs TC avg
Strong +15% interview lift
Without
With
+15.1%
Interview Lift
resolved cases with interview
Typical timeline
3y 9m
Avg Prosecution
39 currently pending
Career history
728
Total Applications
across all art units

Statute-Specific Performance

§101
0.9%
-39.1% vs TC avg
§103
55.2%
+15.2% vs TC avg
§102
19.9%
-20.1% vs TC avg
§112
16.2%
-23.8% vs TC avg
Black line = Tech Center average estimate • Based on career data from 675 resolved cases

Office Action

§102 §103
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 § 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, 26-28, 30-32, 36, 38 and 40 is/are rejected under 35 U.S.C. 102(a)(1) as being anticipated by Dickinson et al. US 2009/0306755. Regarding claim 21, 32, 38 and 40, Dickinson et al. discloses a device for rerouting blood flow, the device comprising: a support structure 22 comprising: a first end portion configured to coaxially appose sidewalls of a first vessel (figure 1, support structure 22, paragraph 0036, end 12 shown coaxially apposing sidewalls of a first vessel 26, support structure along the entire device, paragraph 0019), the first end portion configured to anchor in a first passage (paragraph 0013, 0017, end portions anchor the device in position), wherein the first end portion comprises a first diameter (diameter of portion 12); a second end portion configured to coaxially appose sidewalls of a second vessel (figure 1, support structure 22, paragraph 0036, end 14 shown coaxially apposing sidewalls of a second vessel 28), the second end portion configured to anchor in a second passage different than the first passage (paragraph 0013, 0017, end portions anchor the device in position), wherein the second end portion comprises a second diameter greater than the first diameter (paragraph 0024, two end portions may have different diameters); and an intermediate portion 16 longitudinally between the first end portion and the second end portion and configured to be positioned in a passage between the first vessel and the second vessel (figure 2; in a passage 30 between vessels 26 and 28), wherein the intermediate portion is frustoconical or tapered from the first diameter to the second diameter along an entire length of the intermediate portion (figure 2, intermediate portion 16 between ends 12 and 14 having a different diameter would result in a frustoconical configuration or tapered configuration as they are tapered between the smaller and larger end portion diameters); and a tube 18 coupled to the support structure (paragraph 0018, 0020; tube coupled with the supporting structure embedded within or on the outside of the tube), wherein the tube comprises a polymer (paragraph 0018), and wherein the tube at least partially forms a lumen configured to divert blood flow from the first vessel, through the passage, and into the second vessel (paragraph 0013, 0015, figure 2, fluid flow through the first vessel through the passage to the second vessel through the device). Regarding claim 26, Dickinson et al. discloses wherein the support structure is self-expanding (paragraph 0022, 0026). Regarding claim 27, Dickinson et al. discloses wherein the support structure is balloon expandable (paragraph 0004, 0026) Regarding claim 28, Dickinson et al. discloses wherein the support structure comprises a wire (paragraph 0022, 0036, mesh 22 of metal wire). Regarding claim 30, Dickinson et al. discloses wherein the intermediate portion is frustoconical along an entire length of the intermediate portion between the first end portion and the second end portion (figure 2, paragraph 0024, end portions 12 and 14 may be different diameters, creating a frustoconical shape 16 tapering between the two diameters of the first and second end portions). Regarding claim 31, Dickinson et al. discloses wherein the first end portion 12, the second end portion 14, and the intermediate portion 16 are self-expanding to an expanded state outside a delivery catheter from a compressed state within the delivery catheter (paragraph 0026, self-expanding when removed from the retaining sleeve or catheter), and wherein the first end portion has the first diameter and the second end portion has the second diameter in the expanded state (figure 2, once expanded within target vessel). Regarding claim 36, Dickinson et al. discloses wherein the support structure is self-expanding (paragraph 0022, 0026). 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. Claim(s) 22-25, 29, 33-35, 37 and 39 is/are rejected under 35 U.S.C. 103 as being unpatentable over Dickinson et al. US 2009/0306755 in view of White et al. US 5782904. Regarding claims 22-25, 29, 33-35, 37 and 39, Dickinson et al. discloses wherein the first and second end portions are varying diameters (paragraph 0024, figure 2, creating at least an intermediate portion being tapered or frustoconical) the end portions being cylindrical (for example, shown in figures 1, 3; first and second ends 12 and 14 are cylindrical), wherein the first vessel is an artery (figure 2, artery 26), wherein the second vessel is a vein (figure 2, vein 28) wherein the support structure comprises a laser-perforated shape memory or nitinol tube, and wherein the tube comprises a polymer or PTFE (paragraphs 0018, 0061, 0062, 0063; tube may be a biocompatible polymer such as PTFE, support structure or mesh may be made from any suitable material such as nitinol, or wire mesh may be another structure which supports such as a laser-perforated tube) but fails to explicitly disclose wherein the second end portion is frustoconical, and the first end portion is frustoconical. White et al. discloses a device for rerouting blood flow comprising a first end, second end and intermediate portion, the device may comprising a generally cylindrical or a frusto-conical in shape with a diameter that increases or decreases along the entire length of the device (column 3, lines 34-41). Therefore, it would have been obvious to one having ordinary skill in the art before the effective filing date of the invention to modify Dickinson et al. with wherein the second end portion may be cylindrical or frustoconical, and the first end portion may be cylindrical or frustoconical, as taught by White et al. as necessary for a particular procedure as known in the art to yield predictable results for placing a device within variously sized vessels. Conclusion Any inquiry concerning this communication or earlier communications from the examiner should be directed to CHRISTINA C LAUER whose telephone number is (571)270-5418. The examiner can normally be reached Monday-Thursday 7:00 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, Darwin Erezo can be reached at (571) 272-4695. 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. /CHRISTINA C LAUER/Examiner, Art Unit 3771
Read full office action

Prosecution Timeline

Jan 18, 2025
Application Filed
Aug 07, 2026
Non-Final Rejection mailed — §102, §103 (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

1-2
Expected OA Rounds
68%
Grant Probability
84%
With Interview (+15.1%)
3y 9m (~2y 2m remaining)
Median Time to Grant
Low
PTA Risk
Based on 675 resolved cases by this examiner. Grant probability derived from career allowance rate.

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