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Patent US2573329A successfully refreshed from Google Patents.
US2573329A
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Capacitative commutator
Assignee: Well Surveys Inc
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Filing: 1946-05-24
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Granted: 1951-10-30
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Expires: 1966-05-24
Abstract
No abstract record available.
Inventors
- 👤 Phil C Harris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:01
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2196677A
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US2217383A
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US2257830A
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US2321285A
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US2318936A
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US2349225A
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US2401527A
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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) | 1954-10-29 | 1955-04-30 | 1955-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-10-29 | 1959-04-30 | 1959-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-10-29 | 1963-04-30 | 1963-10-30 | $7700.00 | Window Closed / Lapsed |