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US3491585A
Expired / Lapsed
US
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Continuous vapor-liquid ratio analyzer and method of control
Assignee: Union Oil Company of California
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Filing: 1965-08-30
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Granted: 1970-01-27
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Expires: 1985-08-30
Abstract
No abstract record available.
Inventors
- 👤 Robert H Hass
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:25
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/14; G05; G05D; G05D21/00; G05D21/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2069490A
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US2119786A
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US2306606A
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US2949768A
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US3145561A
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US3276460A
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US3263491A
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US3332856A
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US3336791A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-01-26 | 1973-07-28 | 1974-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-01-26 | 1977-07-28 | 1978-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-01-26 | 1981-07-28 | 1982-01-27 | $7700.00 | Window Closed / Lapsed |