US4576772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter with optimum resistance to bending and method of manufacture
Assignee: Warner Lambert Technologies Inc
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Filing: 1984-07-20
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Granted: 1986-03-18
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Expires: 2004-07-20
Abstract
Abstract A multi-lumen fluid-tight catheter having optimum resistance to bending and method of manufacture. The catheter is notched about its periphery and along its length to create voids which are filled with a vulcanized polymeric material.
Inventors
- 👤 George J. Carpenter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:42
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0009; A61M25/0013; A61M25/0043; A61M25/005; A61M25/0051; A61M25/0054; A61M25/0067; A61M25/0068; A61M25/007; B; B29; B29C; B29C53/00; B29C53/02; B29C53/08; B29C53/083; B29C59/00; B29C59/007; B29D; B29D23/00; A61M25/0021; A61M25/0023; A61M25/0026; A61M2025/004; A61M25/01; A61M25/0105; A61M25/0133; A61M25/0138; B29C37/00; B29C37/0053; B29C37/0057; B29L; B29L2023/00; B29L2023/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
88 words
A method of controlling resistance to bending in a multi-lumen catheter comprising the steps of providing a plastic tube of a given hardness, a given resistance to bending and a given length having a plurality of lumens, notching the tube about its periphery and along its length to create voids and to develop a vertabra-like structure, and filling the voids with a vulcanizable polymeric material having a hardness when cured less than the hardness of said plastic tube whereby the resistance to bending of said tube is reduced.
Claim 2
Independent Claim
88 words
A method of controlling resistance to bending in a multi-lumen catheter comprising the steps of providing a plastic tube of a given hardness, a given resistance to bending and a given length having a plurality of lumens, notching the tube about its periphery and along its length to create voids and to develop a vertabra-like structure, and filling the voids with a vulcanizable polymeric material having a hardness when cured less than the hardness of said plastic tube whereby the resistance to bending of said tube is reduced.
Claim 3
Dependent Claim
20 words
The method of claim 1 in which the notches are formed so as to intersect and communicate with the lumens.
Claim 4
Dependent Claim
16 words
The method of claim 2 plus the step of introducing the polymeric material through the lumens.
Claim 5
Dependent Claim
24 words
The method of claim 3 plus the step of enclosing the exterior of the tube in a transparent envelope to preclude overfilling the notches.
Claim 6
Dependent Claim
17 words
The method of claim 4 plus the step of capping or closing one end of each lumen.
Claim 7
Dependent Claim
17 words
The method of claim 5 plus the step of purging the lumens to displace excess filler material.
Claim 8
Dependent Claim
23 words
The method of claim 6 plus the step of purging the lumens by pushing mandrels through each lumen to displace said filler material.
Claim 9
Dependent Claim
21 words
The method of claim 7 plus the steps of curing the polymeric material and thereafter removing the mandrels and the envelope.
Claim 10
Dependent Claim
11 words
The method of claim 4 where the transparent envelope is polyethylene.
Claim 11
Dependent Claim
12 words
The method of claim 4 where the transparent envelope is polyvinyl chloride.
Claim 12
Dependent Claim
15 words
The method of claim 1 in which the vulcanizable material is a compound of silicone.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-17 | 1989-09-16 | 1990-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-17 | 1993-09-16 | 1994-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-17 | 1997-09-16 | 1998-03-18 | $7700.00 | Window Closed / Lapsed |