Patent US2692961A successfully refreshed from Google Patents.
US2692961A
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Isothermal electromagnetic apparatus
Assignee: AT&T Inc
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Filing: 1950-12-12
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Granted: 1954-10-26
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Expires: 1970-12-12
Abstract
No abstract record available.
Inventors
- 👤 Fondiller William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 12:57
CPC Classifications
H; H05; H05K; H05K7/00; H05K7/20; H05K7/20536; H01; H01H; H01H63/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1701753A
Cited
US1897559A
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US1835470A
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US2085080A
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US2125138A
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US2280133A
Cited
US2473508A
Cited
US2572253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-25 | 1958-04-26 | 1958-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-25 | 1962-04-26 | 1962-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-25 | 1966-04-26 | 1966-10-26 | $7700.00 | Window Closed / Lapsed |