US4450A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring-lancet
Assignee: —
•
Filing: —
•
Granted: 1846-04-11
•
Expires: 1863-04-11
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:24
CPC Classifications
A; A61; A61B; A61B5/00; A61B5/14; A61B5/1405; A61B5/1411; A61B5/15; A61B5/150007; A61B5/150015; A61B5/150022; A61B5/150374; A61B5/150381; A61B5/150412; A61B5/150503; A61B5/150534; A61B5/150633; A61B5/151; A61B5/15101; A61B5/15103; A61B5/15107; A61B5/15113; A61B5/15115; A61B5/15117; A61B5/15186; A61B5/15188
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) | 1849-04-10 | 1849-10-10 | 1850-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1853-04-10 | 1853-10-10 | 1854-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1857-04-10 | 1857-10-10 | 1858-04-11 | $7700.00 | Window Closed / Lapsed |