Patent US2008570A successfully refreshed from Google Patents.
US2008570A
Expired / Lapsed
US
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Dewaxing lubricating oil distillates and residues
Assignee: PETROLEUM PROCESSES Corp
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Filing: 1934-05-25
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Granted: 1935-07-16
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Expires: 1954-05-25
Abstract
No abstract record available.
Inventors
- 👤 Claude F Tears
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:36
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/02; C10G73/06
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) | 1938-07-15 | 1939-01-14 | 1939-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1942-07-15 | 1943-01-14 | 1943-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1946-07-15 | 1947-01-14 | 1947-07-16 | $7700.00 | Window Closed / Lapsed |