US2768252A
Expired / Lapsed
US
⏱️ 0.0 years remaining
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Assignee: North American Aviation Corp
•
Filing: 1952-09-16
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Granted: 1956-10-23
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Expires: 1972-09-16
Abstract
No abstract record available.
Inventors
- 👤 Leroy R Woods
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:49
CPC Classifications
H; H01; H01H; H01H3/00; H01H3/004
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1488733A
Cited
GB191407562A
Cited
US1669509A
Cited
US1959645A
Cited
US2321603A
Cited
US2478929A
Cited
US2715163A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-10-23 | 1960-04-23 | 1960-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-10-23 | 1964-04-23 | 1964-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-10-23 | 1968-04-23 | 1968-10-23 | $7700.00 | Window Closed / Lapsed |