Patent US2998583A successfully refreshed from Google Patents.
US2998583A
Expired / Lapsed
US
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Electrical apparatus and electromagnetic coils and method of making the same
Assignee: Individual
•
Filing: 1956-02-13
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Granted: 1961-08-29
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Expires: 1976-02-13
Abstract
No abstract record available.
Inventors
- 👤 Willis G Worcester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:05
CPC Classifications
H; H01; H01F; H01F41/00; H01F41/02; H01F30/00; H01F30/06; H01F30/10; H01F30/12; H01F27/00; H01F27/28; H01F27/2847
Claims Analysis
Total Claims: 0
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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) | 1964-08-28 | 1965-02-27 | 1965-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-08-28 | 1969-02-27 | 1969-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-08-28 | 1973-02-27 | 1973-08-29 | $7700.00 | Window Closed / Lapsed |