US2637206A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: Union Oil Company of California
•
Filing: 1949-10-13
•
Granted: 1953-05-05
•
Expires: 1969-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Earle R Atkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:48
CPC Classifications
E; E21; E21B; E21B47/00; E21B47/10; E21B47/113; G; G01; G01F; G01F1/00; G01F1/704
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1411796A
Cited
US1440778A
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US1611502A
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US1616481A
Cited
US1808709A
Cited
US2333164A
Cited
US2353382A
Cited
US2453456A
Cited
GB615769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-05-04 | 1956-11-03 | 1957-05-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-05-04 | 1960-11-03 | 1961-05-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-05-04 | 1964-11-03 | 1965-05-05 | $7700.00 | Window Closed / Lapsed |