US2774896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrical machine, the magnetic circuit of which comprises one or more permanent magnets
Assignee: Hartford National Bank and Trust Co
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Filing: 1952-12-06
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Granted: 1956-12-18
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Expires: 1972-12-06
Abstract
No abstract record available.
Inventors
- 👤 Reynst Maximilien Felix
- 👤 Beer Robert Henri De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:29
CPC Classifications
B; B62; B62J; B62J6/00; B62J6/06; H; H02; H02K; H02K21/00; H02K21/02; H02K21/10; H02K21/12; H02K21/24
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-12-18 | 1960-06-18 | 1960-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-12-18 | 1964-06-18 | 1964-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-12-18 | 1968-06-18 | 1968-12-18 | $7700.00 | Window Closed / Lapsed |