US2564320A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permanent magnet type electric generator
Assignee: KEEFE AND MERRITT Co O
•
Filing: 1948-12-17
•
Granted: 1951-08-14
•
Expires: 1968-12-17
Abstract
No abstract record available.
Inventors
- 👤 Maurice W Brainard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:16
CPC Classifications
H; H02; H02K; H02K21/00; H02K21/02; H02K21/04; H02K21/046; H02K21/12; H02K21/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2486435A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-13 | 1955-02-12 | 1955-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-13 | 1959-02-12 | 1959-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-13 | 1963-02-12 | 1963-08-14 | $7700.00 | Window Closed / Lapsed |