Patent US3932627A successfully refreshed from Google Patents.
US3932627A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Siver-heparin-allantoin complex
Assignee: Rescue Products Inc
•
Filing: 1974-02-04
•
Granted: 1976-01-13
•
Expires: 1994-02-04
Abstract
Abstract Silver-heparin-allantoin complex and process for making same is disclosed. The silver-heparin-allantoin complex is prepared by a novel process in either powder or solution form. The silver-heparin-allantoin complex provides a non-thrombogenic, self-sterilizing compound for application to polymeric devices such as prosthetic values, small diameter arterial grafts and the like to avoid thrombus formation and infection of polymeric devices.
Inventors
- 👤 Harry W. Margraf
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:43
CPC Classifications
A; A61; A61K; A61K31/00; A61K31/70; A61K31/715; A61L; A61L27/00; A61L27/50; A61L27/54; A61L33/00; A61L33/0005; A61L33/0011; C; C08; C08B; C08B37/00; C08B37/006; C08B37/0063; C08B37/0075; A61L2300/00; A61L2300/10; A61L2300/102; A61L2300/104; A61L2300/20; A61L2300/23; A61L2300/236; A61L2300/40; A61L2300/404; A61L2300/42; A61L2300/80; A61L2300/802
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
16 words
A non-thrombogenic and anti-microbial complex for application to body contact polymeric devices consisting essentially of silver-heparin-allantoinate.
Claim 2
Dependent Claim
16 words
A non-thrombogenic and anti-microbial complex for application to body contact polymeric devices consisting essentially of silver-heparin-allantoinate.
Claim 3
Dependent Claim
24 words
The composition of claim 1 in which the silver-heparin-allantionate is present in solution in an amount of 60 ml per 100 ml of solution.
Claim 4
Dependent Claim
39 words
The composition of claim 2 in which silver is present in the amount by weight of 0.8%, allantoinate is present in the amount of 2.8%, and there are approximately 40,000 units of heparin in each 100 ml of solution.
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) | 1979-01-12 | 1979-07-14 | 1980-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-12 | 1983-07-14 | 1984-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-12 | 1987-07-14 | 1988-01-13 | $7700.00 | Window Closed / Lapsed |