US2618157A
Expired / Lapsed
US
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Fluid pressure measurement
Assignee: UNITED GEOPHYSICAL Co Inc
•
Filing: 1947-10-10
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Granted: 1952-11-18
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Expires: 1967-10-10
Abstract
No abstract record available.
Inventors
- 👤 Jr Jack R Keeling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:59
CPC Classifications
G; G01; G01L; G01L11/00; G01L11/004; G01L9/00; G01L9/0082; G01L9/0086
Claims Analysis
Total Claims: 0
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US2484541A
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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) | 1955-11-18 | 1956-05-19 | 1956-11-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-18 | 1960-05-19 | 1960-11-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-18 | 1964-05-19 | 1964-11-18 | $7700.00 | Window Closed / Lapsed |