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US2639388A
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Wide-band wavemeter
Assignee: Compagnie des Freins et Signaux Westinghouse SA
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Filing: 1949-11-23
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Granted: 1953-05-19
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Expires: 1969-11-23
Abstract
No abstract record available.
Inventors
- 👤 Matare Herbert Francois
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:03
CPC Classifications
G; G01; G01R; G01R23/00; G01R23/02; G01R23/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22894E
Cited
US1620020A
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GB430645A
Cited
US2444041A
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US2503256A
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US2488545A
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US2556607A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-18 | 1956-11-17 | 1957-05-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-18 | 1960-11-17 | 1961-05-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-18 | 1964-11-17 | 1965-05-19 | $7700.00 | Window Closed / Lapsed |