Patent US2651370A successfully refreshed from Google Patents.
US2651370A
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US
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Borehole flowmeter
Assignee: Sunoco Inc
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Filing: 1947-04-24
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Granted: 1953-09-08
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Expires: 1967-04-24
Abstract
No abstract record available.
Inventors
- 👤 John M Pearson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:57
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/106; E; E21; E21B; E21B47/00; E21B47/10; E21B47/107
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US582874A
Cited
US1440778A
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US1652472A
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US1871319A
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US1974868A
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US2153254A
Cited
US2379138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-09-07 | 1957-03-09 | 1957-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-09-07 | 1961-03-09 | 1961-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-09-07 | 1965-03-09 | 1965-09-08 | $7700.00 | Window Closed / Lapsed |