US2607221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flowmeter
Assignee: Union Oil Company of California
•
Filing: 1946-05-18
•
Granted: 1952-08-19
•
Expires: 1966-05-18
Abstract
No abstract record available.
Inventors
- 👤 Edmund C Babson
- 👤 Richard R Ormsby
- 👤 Marshall C Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 06:50
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/106
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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GB323198A
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US2018030A
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US2283429A
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US2285809A
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US2334920A
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US2325927A
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US2333164A
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US2287786A
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US2379138A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |