US3815608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retaining catheter
Assignee: EAST WEST MED PROD
•
Filing: 1972-03-10
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Granted: 1974-06-11
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Expires: 1992-03-10
Abstract
Abstract A retaining catheter formed of an inert fluorocarbon polymer and including means in the region of the end thereof for retaining said catheter within the body channel in the form of a helical thread projecting radially from the outer surface of the catheter.
Inventors
- 👤 D Spinosa
- 👤 P Riely
- 👤 F Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:24
CPC Classifications
A; A61; A61M; A61M25/00; A61M25/0017; A61M25/01; A61M25/02; A61M25/04
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
134 words
A retention catheter for insertion in a body channel comprising a tubular body formed from a smooth, flexible, inert, hydrophobic material having a low coefficient of friction, and a plurality of closely spaced ribs extending along the exterior of the tubular body for a length at least equal to the length of the body channel, the ribs defining narrow passages therebetween for fluid drainage flow along the exterior surface of the tubular body, the ribs being sufficiently high and sufficiently closely spaced to hold the body channel surface away from the passages and keep the passages open after insertion of the tubular body in the body channel, the ribs extending helically along the exterior surface only adjacent the inserted end, and extending longitudinally and in parallel thence over the remaining portion of the catheter.
Claim 2
Dependent Claim
134 words
A retention catheter for insertion in a body channel comprising a tubular body formed from a smooth, flexible, inert, hydrophobic material having a low coefficient of friction, and a plurality of closely spaced ribs extending along the exterior of the tubular body for a length at least equal to the length of the body channel, the ribs defining narrow passages therebetween for fluid drainage flow along the exterior surface of the tubular body, the ribs being sufficiently high and sufficiently closely spaced to hold the body channel surface away from the passages and keep the passages open after insertion of the tubular body in the body channel, the ribs extending helically along the exterior surface only adjacent the inserted end, and extending longitudinally and in parallel thence over the remaining portion of the catheter.
Claim 3
Dependent Claim
19 words
A retention catheter as recited in claim 1, wherein said tubular body is formed with the ribs integral therewith.
Claim 4
Dependent Claim
18 words
A retention catheter as recited in claim 1, wherein said tubular body material is an inert fluorocarbon polymer.
Claim 5
Dependent Claim
13 words
A retention catheter as recited in claim 3, wherein said material is polytetrafluoroethylene.
Claim 6
Dependent Claim
14 words
A retention catheter as recited in claim 4, wherein the material is foamed polytetrafluoroethylene.
References Cited (Backward Citations)
FR564832A
Cited
US1888349A
Cited
US3228894A
Cited
US3241554A
Cited
US3428046A
Cited
US3498286A
Cited
US3633578A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |