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US2548199A
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Assignee: AT&T Inc
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Filing: 1946-12-20
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Granted: 1951-04-10
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Expires: 1966-12-20
Abstract
No abstract record available.
Inventors
- 👤 Edward J Crane
- 👤 Jr Robert P Cross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 22:51
CPC Classifications
H; H02; H02G; H02G15/00; H02G15/08; H02G15/10; H02G15/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1624630A
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FR327646A
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US1212755A
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US1568422A
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US1566802A
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US1895487A
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US2055189A
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US2079697A
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US2234576A
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US2377394A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-09 | 1954-10-09 | 1955-04-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-09 | 1958-10-09 | 1959-04-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-09 | 1962-10-09 | 1963-04-10 | $7700.00 | Window Closed / Lapsed |