Patent US2580182A successfully refreshed from Google Patents.
US2580182A
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US
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Subsurface flowmeter
Assignee: Gulf Research and Development Co
•
Filing: 1947-05-01
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Granted: 1951-12-25
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Expires: 1967-05-01
Abstract
No abstract record available.
Inventors
- 👤 Morgan Frank
- 👤 Denzel W Reed
- 👤 Muskat Morris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:57
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/68; E; E21; E21B; E21B47/00; E21B47/10; E21B47/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US853492A
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US1265775A
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US1156630A
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US1440778A
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US1652472A
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US2175890A
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US2375273A
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US2352056A
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US2379138A
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US2421759A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-12-24 | 1955-06-25 | 1955-12-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-24 | 1959-06-25 | 1959-12-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-24 | 1963-06-25 | 1963-12-25 | $7700.00 | Window Closed / Lapsed |