Patent US2391286A successfully refreshed from Google Patents.
Patent US104640A successfully refreshed from Google Patents.
US104640A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improvement in watch-chain locks
Assignee: —
•
Filing: —
•
Granted: 1870-06-21
•
Expires: 1887-06-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:07
CPC Classifications
F; F16; F16B; F16B45/00; F16B45/02; F16B45/034; E; E05; E05B; E05B67/00; F16B45/027; Y; Y10; Y10T; Y10T70/00; Y10T70/40; Y10T70/413; Y10T70/437; Y10T70/446; Y10T70/465; Y10T70/467; Y10T70/47; Y10T70/70; Y10T70/7153; Y10T70/7169; Y10T70/80; Y10T70/8432; Y10T70/8676; Y10T70/8757
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) | 1873-06-20 | 1873-12-20 | 1874-06-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1877-06-20 | 1877-12-20 | 1878-06-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1881-06-20 | 1881-12-20 | 1882-06-21 | $7700.00 | Window Closed / Lapsed |