US61931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
And in
Assignee: —
•
Filing: —
•
Granted: 1867-02-12
•
Expires: 1884-02-12
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:31
CPC Classifications
C; C04; C04B; C04B28/00; C04B28/02
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) | 1870-02-11 | 1870-08-13 | 1871-02-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1874-02-11 | 1874-08-13 | 1875-02-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1878-02-11 | 1878-08-13 | 1879-02-12 | $7700.00 | Window Closed / Lapsed |