Patent US2672758A successfully refreshed from Google Patents.
US2672758A
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Preventing fluid pressure gauge hysteresis
Assignee: Standard Oil Development Co
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Filing: 1949-10-21
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Granted: 1954-03-23
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Expires: 1969-10-21
Abstract
No abstract record available.
Inventors
- 👤 Haines C Hibbard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:57
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/0007
Claims Analysis
Total Claims: 0
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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) | 1957-03-22 | 1957-09-21 | 1958-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-22 | 1961-09-21 | 1962-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-22 | 1965-09-21 | 1966-03-23 | $7700.00 | Window Closed / Lapsed |