Patent US2649712A successfully refreshed from Google Patents.
US2649712A
Expired / Lapsed
US
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Oil well flowmeter
Assignee: Individual
•
Filing: 1947-10-06
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Granted: 1953-08-25
•
Expires: 1967-10-06
Abstract
No abstract record available.
Inventors
- 👤 Clarence R Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:43
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/103; E; E21; E21B; E21B47/00; E21B47/10; E21B47/113; E21B47/114
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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |