US2423795A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recovery of hydrocarbons and acetone from admixtures by phase separation and azeotropic distillation
Assignee: Standard Oil Development Co
•
Filing: 1943-01-01
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Granted: 1947-07-08
•
Expires: 1963-01-01
Abstract
No abstract record available.
Inventors
- 👤 John A Patterson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:39
CPC Classifications
C; C07; C07C; C07C7/00; C07C7/04; C07C7/05; C07C7/06; C07C7/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
AT101321B
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US2177183A
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US2167730A
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US2261780A
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US2246376A
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US2212810A
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US2307242A
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US2376870A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-07-07 | 1951-01-06 | 1951-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-07-07 | 1955-01-06 | 1955-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-07-07 | 1959-01-06 | 1959-07-08 | $7700.00 | Window Closed / Lapsed |