US2317951A
Expired / Lapsed
US
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Fractional distillation means
Assignee: Standard Oil Co
•
Filing: 1940-10-18
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Granted: 1943-04-27
•
Expires: 1960-10-18
Abstract
No abstract record available.
Inventors
- 👤 Robert E Burk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:23
CPC Classifications
B; B01; B01D; B01D3/00; B01D3/14; B01D3/26; B01D3/28; B01J; B01J19/00; B01J19/32; B01J2219/00; B01J2219/32; B01J2219/322; B01J2219/32203; B01J2219/32206; B01J2219/32213; B01J2219/32224; B01J2219/32227; B01J2219/32248; B01J2219/32251; B01J2219/324; B01J2219/32408
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1946-04-26 | 1946-10-26 | 1947-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-04-26 | 1950-10-26 | 1951-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-04-26 | 1954-10-26 | 1955-04-27 | $7700.00 | Window Closed / Lapsed |