Patent US2730392A successfully refreshed from Google Patents.
US2730392A
Expired / Lapsed
US
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Magnetic locking device
Assignee: Individual
•
Filing: 1954-11-12
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Granted: 1956-01-10
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Expires: 1974-11-12
Abstract
No abstract record available.
Inventors
- 👤 Nils A Thiebaud
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 11:45
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0038; E05B47/004; Y; Y10; Y10S; Y10S160/00; Y10S160/16; Y10T; Y10T292/00; Y10T292/08; Y10T292/1043; Y10T292/1075; Y10T292/1082; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057; Y10T70/7153; Y10T70/7169
Claims Analysis
Total Claims: 0
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-01-09 | 1959-07-11 | 1960-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-09 | 1963-07-11 | 1964-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-09 | 1967-07-11 | 1968-01-10 | $7700.00 | Window Closed / Lapsed |