Patent US2548855A successfully refreshed from Google Patents.
US2548855A
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Phase shifting apparatus
Assignee: General Electric Co
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Filing: 1946-12-11
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Granted: 1951-04-17
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Expires: 1966-12-11
Abstract
No abstract record available.
Inventors
- 👤 Everhard H B Bartelink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:11
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/24; H03C3/26
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2178012A
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US2220201A
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US2231955A
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US2288740A
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US2238249A
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US2284083A
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US2261356A
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US2294372A
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US2376392A
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US2388769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-04-16 | 1954-10-16 | 1955-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-16 | 1958-10-16 | 1959-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-16 | 1962-10-16 | 1963-04-17 | $7700.00 | Window Closed / Lapsed |