US3618613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Antithrombotic intravascular catheter reinforced with nonkinking means
Assignee: Baxter International Inc
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Filing: 1969-05-19
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Granted: 1971-11-09
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Expires: 1989-05-19
Abstract
Abstract This invention relates to tubular catheters which are inserted through veins to enter the peritoneal cavity for medical purposes. Such tubing catheters have other medical applications such as for drainage or for introduction of medical materials, but since the tubing is of such a small diameter, it has been subject to difficulties in handling. The current invention circumvents problems caused by kinking during use by the application of a wire spring coiled around the tubing in interference fit and then coated with a silicone material to provide the surface finish required for insertion. The distal end of the catheter may be coated with an antithrombotic coating.
Inventors
- 👤 Rudolf R Schulte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:53
CPC Classifications
B; B29; B29C; B29C41/00; B29C41/34; B29C41/36; A; A61; A61M; A61M25/00; A61M25/0043; A61M25/005; B05; B05D; B05D1/00; B05D1/18; A61M25/0009; A61M25/0012; A61M25/0045; B29L; B29L2023/00; B29L2031/00; B29L2031/753; B29L2031/7542
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
114 words
A surgical catheter comprising a flexible tubing made entirely of silicone rubber; an entrance probe integral with the flexible tubing and also made of silicone rubber, said entrance probe having a stepped-down outer diameter less than the outer diameter of the tubing and extending as a cylinder for a substantial distance; an antithrombotic coating of silicone rubber infused with heparin on said entrance probe; a flexible coil spring encircling and in interference fit with said tubing; and a surface coating of silicone rubber, once liquid and later cured to a solid, said coating fully covering the exposed surface of the spring and tubing and substantially filling in the interstices between convolutions of the spring.
Claim 2
Dependent Claim
114 words
A surgical catheter comprising a flexible tubing made entirely of silicone rubber; an entrance probe integral with the flexible tubing and also made of silicone rubber, said entrance probe having a stepped-down outer diameter less than the outer diameter of the tubing and extending as a cylinder for a substantial distance; an antithrombotic coating of silicone rubber infused with heparin on said entrance probe; a flexible coil spring encircling and in interference fit with said tubing; and a surface coating of silicone rubber, once liquid and later cured to a solid, said coating fully covering the exposed surface of the spring and tubing and substantially filling in the interstices between convolutions of the spring.
References Cited (Backward Citations)
US2330399A
Cited
FR1048288A
Cited
US3416531A
Cited
US3434869A
Cited
US3485234A
Cited
US3453194A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |