Patent US3549409A successfully refreshed from Google Patents.
US3549409A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of nonthrombogenic plastics
Assignee: Cordis Corp
•
Filing: 1969-04-28
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Granted: 1970-12-22
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Expires: 1989-04-28
Abstract
No abstract record available.
Inventors
- 👤 Manfred F Dyck
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:27
CPC Classifications
C; C08; C08J; C08J7/00; C08J7/04; C08J7/042; C08J7/0423; C08J2383/00; C08J2383/02; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31725; Y10T428/31739; Y10T428/31855; Y10T428/31938
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US3023074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-12-21 | 1974-06-22 | 1974-12-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-12-21 | 1978-06-22 | 1978-12-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-12-21 | 1982-06-22 | 1982-12-22 | $7700.00 | Window Closed / Lapsed |