US2806729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrically-controlled safety lock
Assignee: Individual
•
Filing: 1952-09-27
•
Granted: 1957-09-17
•
Expires: 1972-09-27
Abstract
No abstract record available.
Inventors
- 👤 Edson L Whipple
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
E; E05; E05B; E05B77/00; E05B77/46; E05B77/48; Y; Y10; Y10S; Y10S292/00; Y10S292/65; Y10T; Y10T292/00; Y10T292/57
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1262435A
Cited
US2001787A
Cited
US1970807A
Cited
US2103702A
Cited
US2371370A
Cited
US2427040A
Cited
US2453505A
Cited
US2459029A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1960-09-16 | 1961-03-18 | 1961-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-16 | 1965-03-18 | 1965-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-16 | 1969-03-18 | 1969-09-17 | $7700.00 | Window Closed / Lapsed |