Patent US2447530A successfully refreshed from Google Patents.
US2447530A
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US
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Process for purifying oils
Assignee: Baker Petrolite LLC
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Filing: 1940-01-03
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Granted: 1948-08-24
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Expires: 1960-01-03
Abstract
No abstract record available.
Inventors
- 👤 Jr Roderick B Perkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:32
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/02; C10G17/04; C10G17/06; C10G32/00; C10G32/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US987115A
Cited
US1540929A
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US1931725A
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US2110899A
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US2126867A
Cited
US2133457A
Cited
US2182145A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-24 | 1952-02-23 | 1952-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-24 | 1956-02-23 | 1956-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-24 | 1960-02-23 | 1960-08-24 | $7700.00 | Window Closed / Lapsed |