US3829903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting blood clot on silicone rubber medical devices
Assignee: Dow Silicones Corp
•
Filing: 1973-03-15
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Granted: 1974-08-20
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Expires: 1993-03-15
Abstract
Abstract Medical devices for prolonged contact with blood are made of silicone rubber having powdered tungsten incorporated therein to inhibit blood clot formation on the device surfaces.
Inventors
- 👤 W Stati
- 👤 J Boone
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:05
CPC Classifications
A; A61; A61L; A61L33/00; A61L33/06; A61L33/068; A61L33/02; A61L33/022; A61N; A61N1/00; A61N1/02; A61N1/04; A61N1/05; C; C08; C08K; C08K3/00; C08K3/02; C08K3/08; Y; Y10; Y10S; Y10S128/00; Y10S128/21; Y10S623/00; Y10S623/915
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
13 words
A method as defined in claim 1 wherein said device is a catheter.
Claim 2
Dependent Claim
14 words
A method as defined in claim 1 wherein said device is a heart valve.
Claim 3
Dependent Claim
23 words
A method as defined in claim 1 wherein said silicone rubber is based on a polydimethylsiloxane cured by use of a platinum catalyst.
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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |