US2432771A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrocarbon separation by azeotropic distillation with trioxane
Assignee: Union Oil Company of California
•
Filing: 1943-11-01
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Granted: 1947-12-16
•
Expires: 1963-11-01
Abstract
No abstract record available.
Inventors
- 👤 George R Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:55
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
FR831295A
Cited
US2162963A
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US2270135A
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US2304080A
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US2265220A
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US2397839A
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US2360655A
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US2313537A
Cited
US2332370A
Cited
US2347447A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-12-15 | 1951-06-16 | 1951-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-12-15 | 1955-06-16 | 1955-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-12-15 | 1959-06-16 | 1959-12-16 | $7700.00 | Window Closed / Lapsed |