US2555650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Azeotropic distillation of hydrocarbons
Assignee: Union Oil Company of California
•
Filing: 1946-01-12
•
Granted: 1951-06-05
•
Expires: 1966-01-12
Abstract
No abstract record available.
Inventors
- 👤 George R Lake
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 16:33
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)
US2397839A
Cited
US2313537A
Cited
US2368050A
Cited
US2367701A
Cited
US2368597A
Cited
US2352534A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-06-04 | 1954-12-04 | 1955-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-06-04 | 1958-12-04 | 1959-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-06-04 | 1962-12-04 | 1963-06-05 | $7700.00 | Window Closed / Lapsed |