US2488840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Time announcing apparatus
Assignee: Individual
•
Filing: 1945-08-17
•
Granted: 1949-11-22
•
Expires: 1965-08-17
Abstract
No abstract record available.
Inventors
- 👤 John W Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:11
CPC Classifications
G; G04; G04C; G04C21/00; G04C21/04; G04C21/12; G04C21/14; H; H04; H04M; H04M3/00; H04M3/42; H04M3/487; H04M3/4872; H04M3/4876
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
DE435326C
Cited
US1618242A
Cited
US1789607A
Cited
US2005596A
Cited
US1866606A
Cited
US2002352A
Cited
US2124673A
Cited
US2289555A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-21 | 1953-05-23 | 1953-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-21 | 1957-05-23 | 1957-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-21 | 1961-05-23 | 1961-11-22 | $7700.00 | Window Closed / Lapsed |