US2428611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of azeotrope former in azeotropic distillation of hydrocarbons
Assignee: Union Oil Company of California
•
Filing: 1941-11-17
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Granted: 1947-10-07
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Expires: 1961-11-17
Abstract
No abstract record available.
Inventors
- 👤 Clyde H O Berg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 22:28
CPC Classifications
C; C10; C10G; C10G7/00; C10G7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2050513A
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US2069329A
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US2186524A
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US2113965A
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US2316860A
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US2294696A
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US2279194A
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US2265220A
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US2290636A
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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) | 1950-10-06 | 1951-04-07 | 1951-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-06 | 1955-04-07 | 1955-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-06 | 1959-04-07 | 1959-10-07 | $7700.00 | Window Closed / Lapsed |