US2469993A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device
Assignee: AT&T Inc
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Filing: 1946-04-12
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Granted: 1949-05-10
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Expires: 1966-04-12
Abstract
No abstract record available.
Inventors
- 👤 Duer C Robson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 09:36
CPC Classifications
F; F16; F16B; F16B41/00; F16B41/005; B; B65; B65H; B65H54/00; B65H54/02; B65H54/40; B65H54/54; Y; Y10; Y10S; Y10S411/00; Y10S411/924; Y10S411/926; Y10S411/948; Y10S411/955; Y10S411/956; Y10S411/96; Y10T; Y10T403/00; Y10T403/32; Y10T403/32114; Y10T403/32213; Y10T403/32975; Y10T403/32983; Y10T403/60; Y10T403/602; Y10T403/76
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-05-09 | 1952-11-08 | 1953-05-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-05-09 | 1956-11-08 | 1957-05-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-05-09 | 1960-11-08 | 1961-05-10 | $7700.00 | Window Closed / Lapsed |