US43670A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved butt-hinge
Assignee: —
•
Filing: —
•
Granted: 1864-08-02
•
Expires: 1881-08-02
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:55
CPC Classifications
E; E05; E05D; E05D11/00; E05D11/06; E05D3/00; E05D3/02; E05D5/00; E05D5/02; E05D5/04; E05D2003/025; E05D2003/027
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) | 1867-08-02 | 1868-02-01 | 1868-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1871-08-02 | 1872-02-01 | 1872-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1875-08-02 | 1876-02-01 | 1876-08-02 | $7700.00 | Window Closed / Lapsed |