Patent US2531121A successfully refreshed from Google Patents.
US2531121A
Expired / Lapsed
US
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Mechanical time fuse
Assignee: George W Borg Corp
•
Filing: 1944-10-05
•
Granted: 1950-11-21
•
Expires: 1964-10-05
Abstract
No abstract record available.
Inventors
- 👤 Fink Jean
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:01
CPC Classifications
F; F42; F42C; F42C9/00; F42C9/02; F42C9/04; F42C9/041; F42C9/045; F42C9/14; F42C9/141
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) | 1953-11-20 | 1954-05-22 | 1954-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-11-20 | 1958-05-22 | 1958-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-11-20 | 1962-05-22 | 1962-11-21 | $7700.00 | Window Closed / Lapsed |