Patent US2162195A successfully refreshed from Google Patents.
US2162195A
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Process for refining hydrocarbon oils
Assignee: Shell Development Co
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Filing: 1935-02-06
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Granted: 1939-06-13
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Expires: 1955-02-06
Abstract
No abstract record available.
Inventors
- 👤 Greensfelder Bernard Sutro
- 👤 Spaght Monroe Edward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:13
CPC Classifications
C; C10; C10G; C10G21/00; C10G21/06; C10G21/12; C10G21/27; C10M; C10M175/00; C10M175/005
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) | 1942-06-12 | 1942-12-12 | 1943-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1946-06-12 | 1946-12-12 | 1947-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1950-06-12 | 1950-12-12 | 1951-06-13 | $7700.00 | Window Closed / Lapsed |