US1437951A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spleen extract
Assignee: Individual
•
Filing: 1920-09-22
•
Granted: 1922-12-05
•
Expires: 1940-09-22
Abstract
No abstract record available.
Inventors
- 👤 Jr T C Van Ness
- 👤 Robert A Archibald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:22
CPC Classifications
A; A61; A61K; A61K35/00; A61K35/12; A61K35/28
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1925-12-04 | 1926-06-05 | 1926-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1929-12-04 | 1930-06-05 | 1930-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1933-12-04 | 1934-06-05 | 1934-12-05 | $7700.00 | Window Closed / Lapsed |