Patent US1975885A successfully refreshed from Google Patents.
US2677804A
Expired / Lapsed
US
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Means for testing high-frequency apparatus
Assignee: Ohmega Laboratories
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Filing: 1951-10-05
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Granted: 1954-05-04
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Expires: 1971-10-05
Abstract
No abstract record available.
Inventors
- 👤 Harry R Foster
- 👤 Elmo E Crump
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:09
CPC Classifications
G; G01; G01R; G01R23/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2422134A
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US2483802A
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US2534957A
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US2493145A
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US2626980A
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US2610228A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-05-03 | 1957-11-02 | 1958-05-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-03 | 1961-11-02 | 1962-05-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-03 | 1965-11-02 | 1966-05-04 | $7700.00 | Window Closed / Lapsed |