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US2652535A
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US
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High-frequency testing apparatus
Assignee: GTE Sylvania Inc
•
Filing: 1948-01-02
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Granted: 1953-09-15
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Expires: 1968-01-02
Abstract
No abstract record available.
Inventors
- 👤 Richard M Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:37
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/02; G01R21/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2265637A
Cited
US2204179A
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US2434610A
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US2473274A
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US2478317A
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US2549385A
Cited
US2434334A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-14 | 1957-03-16 | 1957-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-14 | 1961-03-16 | 1961-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-14 | 1965-03-16 | 1965-09-15 | $7700.00 | Window Closed / Lapsed |