US3507528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Locking device
Assignee: Westinghouse Electric Corp
•
Filing: 1965-02-16
•
Granted: 1970-04-21
•
Expires: 1985-02-16
Abstract
No abstract record available.
Inventors
- 👤 Walter E Desmarchais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:45
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/10; F16B21/16; F16B21/165; Y; Y10; Y10T; Y10T403/00; Y10T403/36; Y10T403/364; Y10T403/59; Y10T403/599
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR855275A
Cited
US2370083A
Cited
US2939739A
Cited
US3107209A
Cited
US3068737A
Cited
US3117484A
Cited
GB957177A
Cited
FR1241050A
Cited
US3012811A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-04-20 | 1973-10-20 | 1974-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-04-20 | 1977-10-20 | 1978-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-04-20 | 1981-10-20 | 1982-04-21 | $7700.00 | Window Closed / Lapsed |