US2526499A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Refining heavy oils
Assignee: Standard Oil Development Co
•
Filing: 1946-05-31
•
Granted: 1950-10-17
•
Expires: 1966-05-31
Abstract
No abstract record available.
Inventors
- 👤 Henry C Paulsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:45
CPC Classifications
C; C10; C10G; C10G25/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1295308A
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US1665845A
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US1823175A
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US2076524A
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US2202806A
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US2170628A
Cited
US2204234A
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US2219726A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |