Patent US1939946A successfully refreshed from Google Patents.
US1939946A
Expired / Lapsed
US
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Process of separating crystalline wax, amorphous wax, and lubricating oil from wax slop
Assignee: FILTROL Co OF CALIFORNIA
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Filing: 1929-02-11
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Granted: 1933-12-19
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Expires: 1949-02-11
Abstract
No abstract record available.
Inventors
- 👤 Walter S Baylis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:48
CPC Classifications
C; C10; C10G; C10G73/00; C10G73/36
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) | 1936-12-18 | 1937-06-19 | 1937-12-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1940-12-18 | 1941-06-19 | 1941-12-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1944-12-18 | 1945-06-19 | 1945-12-19 | $7700.00 | Window Closed / Lapsed |