Patent US2649080A successfully refreshed from Google Patents.
Patent US296539A successfully refreshed from Google Patents.
Patent US42077A successfully refreshed from Google Patents.
US42077A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Improved screw-head
Assignee: —
•
Filing: —
•
Granted: 1864-03-29
•
Expires: 1881-03-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 16:36
CPC Classifications
G; G06; G06Q; G06Q10/00; G06Q10/08; G06Q10/087; G06Q10/0875; F; F16; F16B; F16B35/00; F16B35/04; F16B35/06; G06Q20/00; G06Q20/08; G06Q20/20; G06Q20/203; G06Q50/00; G06Q50/10; G06Q50/12
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) | 1867-03-29 | 1867-09-28 | 1868-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1871-03-29 | 1871-09-28 | 1872-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1875-03-29 | 1875-09-28 | 1876-03-29 | $7700.00 | Window Closed / Lapsed |