Patent US2174331A successfully refreshed from Google Patents.
US2174331A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control clock
Assignee: JOHN W SILBAUGH
•
Filing: 1936-09-26
•
Granted: 1939-09-26
•
Expires: 1956-09-26
Abstract
No abstract record available.
Inventors
- 👤 John B Schroeder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:22
CPC Classifications
G; G04; G04C; G04C23/00; G04C23/14; G04C23/18; G04C23/22; G04C23/24
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) | 1942-09-25 | 1943-03-27 | 1943-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-09-25 | 1947-03-27 | 1947-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-09-25 | 1951-03-27 | 1951-09-26 | $7700.00 | Window Closed / Lapsed |