Patent US1521793A successfully refreshed from Google Patents.
US1521793A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alarm device
Assignee: HOLMES ELECTRIC PROTECTIVE CO
•
Filing: 1922-07-31
•
Granted: 1925-01-06
•
Expires: 1942-07-31
Abstract
No abstract record available.
Inventors
- 👤 William C Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:26
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/02; H01H3/022; H01H2003/0233
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) | 1928-01-06 | 1928-07-07 | 1929-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1932-01-06 | 1932-07-07 | 1933-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1936-01-06 | 1936-07-07 | 1937-01-06 | $7700.00 | Window Closed / Lapsed |