Patent US2958822A successfully refreshed from Google Patents.
US2958822A
Expired / Lapsed
US
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Low frequency spectrum and amplitude distribution analyzer
Assignee: Individual
•
Filing: 1956-04-26
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Granted: 1960-11-01
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Expires: 1976-04-26
Abstract
No abstract record available.
Inventors
- 👤 Donald P Rogers
- 👤 Donal B Staake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:34
CPC Classifications
G; G10; G10L; G10L21/00; G10L21/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2858438A
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US2889503A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-01 | 1964-05-02 | 1964-11-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-01 | 1968-05-02 | 1968-11-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-01 | 1972-05-02 | 1972-11-01 | $7700.00 | Window Closed / Lapsed |