US3494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manner of
Assignee: —
•
Filing: —
•
Granted: 1844-03-20
•
Expires: 1861-03-20
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:45
CPC Classifications
B; B23; B23D; B23D45/00; B23D45/10; Y; Y10; Y10T; Y10T83/00; Y10T83/02; Y10T83/0304; Y10T83/0311; Y10T83/647; Y10T83/6476
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
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) | 1847-03-20 | 1847-09-19 | 1848-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1851-03-20 | 1851-09-19 | 1852-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1855-03-20 | 1855-09-19 | 1856-03-20 | $7700.00 | Window Closed / Lapsed |