US1953546A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic danger signal
Assignee: Individual
•
Filing: 1931-05-05
•
Granted: 1934-04-03
•
Expires: 1951-05-05
Abstract
No abstract record available.
Inventors
- 👤 John W Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:48
CPC Classifications
G; G08; G08G; G08G1/00; G08G1/09; G08G1/0962; G08G1/0967; G08G1/096708; G08G1/096716; G08G1/096733; G08G1/096758; G08G1/096766; G08G1/096783; Y; Y10; Y10S; Y10S200/00; Y10S200/30; Y10S200/31
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) | 1937-04-02 | 1937-10-02 | 1938-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-04-02 | 1941-10-02 | 1942-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-04-02 | 1945-10-02 | 1946-04-03 | $7700.00 | Window Closed / Lapsed |