US2639612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential tensiometer
Assignee: Cooper Industries LLC
•
Filing: 1947-05-29
•
Granted: 1953-05-26
•
Expires: 1967-05-29
Abstract
No abstract record available.
Inventors
- 👤 Allen Herbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:49
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/04; G01L5/06; Y; Y10; Y10T; Y10T74/00; Y10T74/20; Y10T74/20006
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US892021A
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FR15091E
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GB130658A
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US1400776A
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US1840039A
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US2118727A
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US2196099A
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US2309211A
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US2298216A
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US2285471A
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US2361915A
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US2401576A
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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) | 1956-05-25 | 1956-11-24 | 1957-05-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-25 | 1960-11-24 | 1961-05-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-25 | 1964-11-24 | 1965-05-26 | $7700.00 | Window Closed / Lapsed |