Patent US2610989A successfully refreshed from Google Patents.
US2610989A
Expired / Lapsed
US
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Electrical measuring instrument
Assignee: Westinghouse Electric Corp
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Filing: 1947-02-21
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Granted: 1952-09-16
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Expires: 1967-02-21
Abstract
No abstract record available.
Inventors
- 👤 David B Wiese
- 👤 Henry L Bernarde
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:44
CPC Classifications
G; G01; G01R; G01R5/00; G01R5/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US404470A
Cited
US497448A
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FR509235A
Cited
GB296749A
Cited
US2179952A
Cited
US2183685A
Cited
US2183566A
Cited
US2179305A
Cited
US2501356A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-09-16 | 1956-03-17 | 1956-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-09-16 | 1960-03-17 | 1960-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-09-16 | 1964-03-17 | 1964-09-16 | $7700.00 | Window Closed / Lapsed |