US2992304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electromagnetic thrust motor
Assignee: Cook Electric Co
•
Filing: 1958-01-06
•
Granted: 1961-07-11
•
Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 John M Andrews
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:36
CPC Classifications
H; H01; H01H; H01H50/00; H01H50/16; H01H50/18; H01H50/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1700314A
Cited
US1932164A
Cited
US2507940A
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US2457017A
Cited
US2476794A
Cited
US2775671A
Cited
US2807688A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |