US2764729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency sensitive overload protective apparatus
Assignee: Boeing Co
•
Filing: 1953-10-30
•
Granted: 1956-09-25
•
Expires: 1973-10-30
Abstract
No abstract record available.
Inventors
- 👤 Jack D Israel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:38
CPC Classifications
H; H02; H02P; H02P9/00; H02P9/14; H02P9/20; H02P9/22; H02P2101/00; H02P2101/30
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) | 1959-09-25 | 1960-03-26 | 1960-09-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-09-25 | 1964-03-26 | 1964-09-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-09-25 | 1968-03-26 | 1968-09-25 | $7700.00 | Window Closed / Lapsed |