Patent US2588915A successfully refreshed from Google Patents.
US2588915A
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Means for obtaining predetermined phase shift characteristics
Assignee: Stromberg Carlson Corp
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Filing: 1949-12-22
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Granted: 1952-03-11
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Expires: 1969-12-22
Abstract
No abstract record available.
Inventors
- 👤 Walter H Erikson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:48
CPC Classifications
H; H03; H03H; H03H7/00; H03H7/18; G; G11; G11B; G11B5/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1870778A
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US1892935A
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US2008699A
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US1940282A
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US2253186A
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US2300239A
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US2446479A
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US2466186A
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US2471251A
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US2511606A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-03-11 | 1955-09-10 | 1956-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-03-11 | 1959-09-10 | 1960-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-03-11 | 1963-09-10 | 1964-03-11 | $7700.00 | Window Closed / Lapsed |