US1958940A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic lock
Assignee: Individual
•
Filing: 1934-01-18
•
Granted: 1934-05-15
•
Expires: 1954-01-18
Abstract
No abstract record available.
Inventors
- 👤 Glen F Cavanaugh
- 👤 Calmeyn Alex
- 👤 Bruijnooghe Peter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:09
CPC Classifications
E; E05; E05C; E05C19/00; E05C19/16; E05C19/166; E05C19/168; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0999; Y10T292/1014; Y10T292/1021; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7062; Y10T70/7119
Claims Analysis
Total Claims: 0
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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) | 1937-05-14 | 1937-11-13 | 1938-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1941-05-14 | 1941-11-13 | 1942-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1945-05-14 | 1945-11-13 | 1946-05-15 | $7700.00 | Window Closed / Lapsed |