Patent US3457781A successfully refreshed from Google Patents.
US3457781A
Expired / Lapsed
US
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Modified dynamometer
Assignee: Phillips Petroleum Co
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Filing: 1966-08-29
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Granted: 1969-07-29
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Expires: 1986-08-29
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 07:47
CPC Classifications
G; G01; G01L; G01L5/00; G01L5/0061; G01L1/00; G01L1/20; G01L1/22; G01L1/225; G01L1/2262; G01L5/04; G01L5/10; G01L5/101
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1877467A
Cited
US2063169A
Cited
US2440706A
Cited
US2472047A
Cited
US2596361A
Cited
US2659233A
Cited
US3343409A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-07-28 | 1973-01-27 | 1973-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-07-28 | 1977-01-27 | 1977-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-07-28 | 1981-01-27 | 1981-07-29 | $7700.00 | Window Closed / Lapsed |