US2335596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining of refractory hydrocarbons
Assignee: Standard Oil Co
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Filing: 1939-12-30
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Granted: 1943-11-30
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Expires: 1959-12-30
Abstract
No abstract record available.
Inventors
- 👤 Robert F Marschner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:38
CPC Classifications
C; C10; C10M; C10M1/00; C10M1/08; C07; C07C; C07C6/00; C07C6/08; C07C6/12; C07C6/126; C10G; C10G59/00; C10G59/02; C10L; C10L1/00; C10L1/04; C10L1/06; C10M2211/00; C10M2211/02; C10M2211/024; C10M2211/06
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) | 1946-11-29 | 1947-05-31 | 1947-11-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1950-11-29 | 1951-05-31 | 1951-11-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1954-11-29 | 1955-05-31 | 1955-11-30 | $7700.00 | Window Closed / Lapsed |