Patent US3374398A successfully refreshed from Google Patents.
US3374398A
Expired / Lapsed
US
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Magnetic circuit protective device
Assignee: Lockheed Martin Corp
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Filing: 1966-01-07
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Granted: 1968-03-19
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Expires: 1986-01-07
Abstract
No abstract record available.
Inventors
- 👤 Richard A Horn
- 👤 Howard I Cole
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 04:38
CPC Classifications
H; H02; H02H; H02H3/00; H02H3/20; H02H11/00; H02H3/08; H02H3/26; H02H3/32; H02H3/34
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2700125A
Cited
US2746000A
Cited
US3214638A
Cited
US3202875A
Cited
US3165671A
Cited
US3213321A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-03-19 | 1971-09-18 | 1972-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-03-19 | 1975-09-18 | 1976-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-03-19 | 1979-09-18 | 1980-03-19 | $7700.00 | Window Closed / Lapsed |