US3416749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic hysteresis apparatus
Assignee: Northrop Grumman Space and Mission Systems Corp
•
Filing: 1965-05-10
•
Granted: 1968-12-17
•
Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 James P O'neill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:54
CPC Classifications
H; H02; H02K; H02K49/00; H02K49/06; H02K49/065
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1960915A
Cited
US2237142A
Cited
US2603678A
Cited
US2745974A
Cited
US3034744A
Cited
US3176174A
Cited
US3282532A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-12-17 | 1972-06-17 | 1972-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-12-17 | 1976-06-17 | 1976-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-12-17 | 1980-06-17 | 1980-12-17 | $7700.00 | Window Closed / Lapsed |