US2911592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase and amplitude measuring systems
Assignee: WESTHINGHOUSE AIR BRAKE Co
•
Filing: 1955-06-01
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Granted: 1959-11-03
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Expires: 1975-06-01
Abstract
No abstract record available.
Inventors
- 👤 Colker James
- 👤 Michael J Draganjac
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:24
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1992625A
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US2679630A
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US2564682A
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US2524515A
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US2548014A
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US2851662A
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US2677086A
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US2742618A
Cited
US2808550A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-11-02 | 1963-05-04 | 1963-11-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-02 | 1967-05-04 | 1967-11-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-02 | 1971-05-04 | 1971-11-03 | $7700.00 | Window Closed / Lapsed |