US2679182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring changes in fluid flow velocity
Assignee: Pure Oil Co
•
Filing: 1948-08-26
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Granted: 1954-05-25
•
Expires: 1968-08-26
Abstract
No abstract record available.
Inventors
- 👤 Ronald R Proctor
- 👤 Don J Wangelin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:12
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1122710A
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US1808709A
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US1930496A
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US1837222A
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US1927402A
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US1977359A
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US2283429A
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US2353382A
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US2453456A
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US2471852A
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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) | 1957-05-24 | 1957-11-23 | 1958-05-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-05-24 | 1961-11-23 | 1962-05-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-05-24 | 1965-11-23 | 1966-05-25 | $7700.00 | Window Closed / Lapsed |