Patent US2630560A successfully refreshed from Google Patents.
US2630560A
Expired / Lapsed
US
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Radio-frequency transformer
Assignee: GTE Sylvania Inc
•
Filing: 1949-04-05
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Granted: 1953-03-03
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Expires: 1969-04-05
Abstract
No abstract record available.
Inventors
- 👤 Howard D Earl
- 👤 Marion J Pifer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:45
CPC Classifications
H; H01; H01F; H01F21/00; H01F21/02; H01F21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2127241A
Cited
US2343101A
Cited
GB457263A
Cited
GB502296A
Cited
US2364291A
Cited
US2307447A
Cited
US2388295A
Cited
US2430990A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-03-02 | 1956-09-01 | 1957-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-03-02 | 1960-09-01 | 1961-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-03-02 | 1964-09-01 | 1965-03-03 | $7700.00 | Window Closed / Lapsed |