Patent US2540594A successfully refreshed from Google Patents.
Patent US3514791A successfully refreshed from Google Patents.
US3514791A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tissue grafts
Assignee: Individual
•
Filing: 1967-07-25
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Granted: 1970-06-02
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Expires: 1987-07-25
Abstract
No abstract record available.
Inventors
- 👤 Charles H Sparks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/24; A61F2/2412; A61F2/2415; A61F2/04; A61F2/06; A61F2/062; Y; Y10; Y10S; Y10S623/00; Y10S623/915
Claims Analysis
Total Claims: 0
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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) | 1973-06-01 | 1973-12-01 | 1974-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-01 | 1977-12-01 | 1978-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-01 | 1981-12-01 | 1982-06-02 | $7700.00 | Window Closed / Lapsed |