US2002533A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separation of hydrocarbons and their oxygen-containing derivatives
Assignee: Standard Oil Development Co
•
Filing: 1928-05-21
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Granted: 1935-05-28
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Expires: 1948-05-21
Abstract
No abstract record available.
Inventors
- 👤 Per K Frolich
- 👤 James W Pugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 01:18
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/16; C07; C07C; C07C27/00; C07C27/26; C07C27/34; C07C29/00; C07C29/74; C07C31/00; C07C31/02; C07C31/04; C07C45/00; C07C45/78; C11; C11C; C11C1/00; C11C1/02
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) | 1938-05-27 | 1938-11-26 | 1939-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-05-27 | 1942-11-26 | 1943-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-05-27 | 1946-11-26 | 1947-05-28 | $7700.00 | Window Closed / Lapsed |