Patent US1276941A successfully refreshed from Google Patents.
US1276941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door-spring.
Assignee: Individual
•
Filing: 1918-04-17
•
Granted: 1918-08-27
•
Expires: 1938-04-17
Abstract
No abstract record available.
Inventors
- 👤 Hoff M Mansager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 10:46
CPC Classifications
E; E05; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1041; E05F1/1066
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) | 1921-08-26 | 1922-02-25 | 1922-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1925-08-26 | 1926-02-25 | 1926-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1929-08-26 | 1930-02-25 | 1930-08-27 | $7700.00 | Window Closed / Lapsed |