Patent US2648821A successfully refreshed from Google Patents.
US2648821A
Expired / Lapsed
US
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Var measuring device
Assignee: Westinghouse Electric Corp
•
Filing: 1948-01-29
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Granted: 1953-08-11
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Expires: 1968-01-29
Abstract
No abstract record available.
Inventors
- 👤 Ambrose J Petzinger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:47
CPC Classifications
G; G01; G01R; G01R21/00; G01R21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1953519A
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US2068575A
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US2454201A
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US2424596A
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US2495158A
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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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |