Prosecution Insights
Last updated: October 02, 2026
Application No. 18/300,966

VARIABLE STIFFNESS MULTI-LUMEN TUBE

Final Rejection §103§112
Filed
Apr 14, 2023
Priority
Apr 19, 2022 — provisional 63/332,321
Examiner
BOUCHELLE, LAURA A
Art Unit
3783
Tech Center
3700 — Mechanical Engineering & Manufacturing
Assignee
Boston Scientific Corporation
OA Round
2 (Final)
80%
Grant Probability
Favorable
3-4
OA Rounds
0m
Est. Remaining
91%
With Interview

Examiner Intelligence

Grants 80% — above average
80%
Career Allowance Rate
980 granted / 1222 resolved
+10.2% vs TC avg
Moderate +11% lift
Without
With
+10.7%
Interview Lift
resolved cases with interview
Typical timeline
3y 2m
Avg Prosecution
42 currently pending
Career history
1249
Total Applications
across all art units

Statute-Specific Performance

§101
1.3%
-38.7% vs TC avg
§103
47.5%
+7.5% vs TC avg
§102
25.4%
-14.6% vs TC avg
§112
15.8%
-24.2% vs TC avg
Black line = Tech Center average estimate • Based on career data from 1222 resolved cases

Office Action

§103 §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 . Response to Arguments Applicant's arguments filed 7/16/2026 have been fully considered. Regarding the amendment to claim 1, the examiner agrees that Applicant has amended claim 1 to include subject matter previously indicated allowable. this overcomes the prior rejection and therefore the rejection is withdrawn. Regarding the rejections under 112(b), Applicant’s arguments have been considered and are not persuasive. Applicant has not argued against the rejection, nor amended the claims and therefore the rejections have not been overcome. As stated in the prior office action, the claims are being interpreted as product by process limitations, however, they are not clearly written as such, and are therefore unclear as written. Regarding the 103 rejections, the examiner agrees that the amendments to the claims to include allowable subject matter overcomes the rejection and the rejection is therefore withdrawn. Regarding the new claims, Applicant’s argument are not convincing. The claim limitation “wherein a density of a radially in portion of the integral tube differs from a density of a radially outer portion of the integral tube” was previously recited in original claim 3 and was rejected. Applicant has not provided a response to that rejection. 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. The following is a quotation of 35 U.S.C. 112 (pre-AIA ), second paragraph: The specification shall conclude with one or more claims particularly pointing out and distinctly claiming the subject matter which the applicant regards as his invention. Claims 8, 11, 13 are 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 8 calls for one of the braid or the coil to be at a temperature of at least 250 degrees Celsius. The scope of this claim limitation is unclear. Claim 1, from which claim 8 depends, recites a medical device. Heating the braid or coil to 250 degrees Celsius is describes as a manufacturing step of the device, not as a part of the device. in other words, it is not clear that the device of claim 1 includes the braid at 250 degrees Celsius. Therefore, this limitation is being interpreted as a product by process limitation wherein the coil or braid is heated to at least 250 degrees Celsius. Claim 11 calls for the at least one mandrel to be at a temperature greater than or equal to 250 degrees Celsius. As discussed above with regard to claim 8, heating the mandrel to 250 degrees Celsius is describes as a manufacturing step of the device, not as a part of the device. in other words, it is not clear that the device of claim 1 includes the mandrel at 250 degrees Celsius. Therefore, this limitation is being interpreted as a product by process limitation wherein the mandrel is heated to at least 250 degrees Celsius. Claim 13 calls for a first mandrel of the plurality of mandrels to be at a first temperature, and a second mandrel of the plurality of mandrels to be at a second temperature different from the first temperature. As discussed above with regard to claims 8 and 11, heating the mandrels is describes as a manufacturing step of the device, not as a part of the device. in other words, it is not clear that the device of claim 1 includes the first mandrel of the plurality of mandrels to be at a first temperature, and the second mandrel of the plurality of mandrels to be at a second temperature different from the first temperature. Therefore, this limitation is being interpreted as a product by process limitation wherein the first mandrel of the plurality of mandrels to be at a first temperature, and the second mandrel of the plurality of mandrels to be at a second temperature different from the first temperature. Claim Rejections - 35 USC § 103 The text of those sections of Title 35, U.S. Code not included in this action can be found in a prior Office action. Claim(s) 21, 23-26 is/are rejected under 35 U.S.C. 103 as being unpatentable over Bauer et al (US 2016/0271363) in view of Shannon et al (US 9,364,360). Regarding claim 21, Bauer discloses a medical device comprising a shaft 115 (fig. 3), wherein the shaft includes an integral tube defining a plurality of lumens 170 (fig. 3; page 3, para. 0031), the integral tube comprised of at least one of PTFE and ePTFE (page 6, para. 0060). Claim 21 differs from Bauer in calling for a density of a radially inner portion of the tube to differ from a density of a radially outer portion of the tube. Shannon teaches a shaft formed from PTFE wherein the density of the inner section of the tube is greater than the density the outer section of the tube, specifically, the inner layer of the tube has a higher density that the outer layer of the tube (col. 7, lines 4-10) thereby providing an inner surface with reduced friction for easier insertion of elements therethrough and for easier removal of the forming mandrel (col. 7, lines 4-10). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the shaft of Bauer such that the density of the PTFE varies along the length of the tube as taught by Shannon so that the inner portion of the tube has a low friction surface to ease insertion of elements through the lumen and to improve ease of removal of the forming mandrel. Regarding claim 23, Bauer discloses that the lumens are nonconcentric within the cross-section of the integral tube (fig. 3), and therefore the structure resulting from the combination described above with regard to claim 21 includes the density nonconcentric with a cross-section of the integral tube. Regarding claim 24, Bauer discloses a medical device comprising a shaft 115 (fig. 3), wherein the shaft includes an integral tube defining a plurality of lumens 170 (fig. 3; page 3, para. 0031), the integral tube comprised of at least one of PTFE and ePTFE (page 6, para. 0060). Claim 24 differs from Bauer in calling for a density of a first wall defining a first lumen differs from a density of a second wall defining a second lumen. Shannon teaches a shaft formed from PTFE wherein the density of the inner wall of the lumen is greater than the density the outer section of the tube (col. 7, lines 4-10) thereby providing an inner surface with reduced friction for easier insertion of elements therethrough and for easier removal of the forming mandrel (col. 7, lines 4-10). It would have been obvious to one of ordinary skill in the art before the effective filing date of the claimed invention to modify the shaft of Bauer to modify the density of inner wall of the lumen of the tube as taught by Shannon so that the inner portion of the tube has a low friction surface to ease insertion of elements through the lumen and to improve ease of removal of the forming mandrel. The result is that the density of the wall of the first lumen is different than the density of the wall of the second lumen. Regarding claim 25, Bauer discloses that the first wall and the second wall are in the same cross-sectional plane of the tube (fig. 3). Regarding claim 26, Bauer discloses that the lumens are nonconcentric within the cross-section of the integral tube (fig. 3), and therefore the structure resulting from the combination described above with regard to claim 21 includes the density nonconcentric with a cross-section of the integral tube. Allowable Subject Matter Claims 1-3, 5-7, 9, 10, 12, 14, 15 are allowed. Claim 22 is objected to as being dependent upon a rejected base claim, but would be allowable if rewritten in independent form including all of the limitations of the base claim and any intervening claims. The following is a statement of reasons for the indication of allowable subject matter: see prior office actions. 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 LAURA A BOUCHELLE whose telephone number is (571)272-2125. The examiner can normally be reached Mon-Fri 8:00-5:00 CST. 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, Bhisma Mehta can be reached at 571-272-3383. 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. LAURA A. BOUCHELLE Primary Examiner Art Unit 3783 /LAURA A BOUCHELLE/Primary Examiner, Art Unit 3783
Read full office action

Prosecution Timeline

Apr 14, 2023
Application Filed
Apr 16, 2026
Non-Final Rejection mailed — §103, §112
Jul 16, 2026
Response Filed
Aug 12, 2026
Final Rejection mailed — §103, §112 (current)

Precedent Cases

Applications granted by this same examiner with similar technology

Patent 12746152
INJECTION DEVICE WITH BOTH LINEAR AND ROTARY INDEPENDENT MOTOR DRIVES
3y 7m to grant Granted Sep 29, 2026
Patent 12728183
MEDICAL SYSTEM INCLUDING STEERABLE CATHETER AND METHOD OF MANUFACTURING
3y 11m to grant Granted Sep 08, 2026
Patent 12721750
CONTROLLED INJECTION BETWEEN TWO TISSUE LAYERS OF THE HUMAN EYE
3y 9m to grant Granted Sep 01, 2026
Patent 12714782
INFUSION PUMP WITH ADD-ON MODULES
2y 9m to grant Granted Aug 25, 2026
Patent 12708707
System and Method for Pressure Management for a Drug Delivery Device
4y 9m to grant Granted Aug 18, 2026
Study what changed to get past this examiner. Based on 5 most recent grants.

Strategy Recommendation AI-generated — please review before filing

Get a prosecution strategy drawn from examiner precedents, rejection analysis, and claim mapping.
Typically takes 5-10 seconds — AI-generated, attorney review required before filing

Prosecution Projections

3-4
Expected OA Rounds
80%
Grant Probability
91%
With Interview (+10.7%)
3y 2m (~0m remaining)
Median Time to Grant
Moderate
PTA Risk
Based on 1222 resolved cases by this examiner. Grant probability derived from career allowance rate.

Sign in with your work email

Enter your email to receive a magic link. No password needed.

Personal email addresses (Gmail, Yahoo, etc.) are not accepted.

Free tier: 3 strategy analyses per month