US2438565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of purifying a hydrocarbon material containing a relatively small amount of an organic fluorine compound
Assignee: Universal Oil Products Co
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Filing: 1945-10-26
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Granted: 1948-03-30
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Expires: 1965-10-26
Abstract
No abstract record available.
Inventors
- 👤 Carl B Linn
- 👤 Julian M Mavity
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:05
CPC Classifications
C; C10; C10G; C10G17/00; C10G17/09; B; B01; B01J; B01J27/00; B01J27/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-30 | 1951-09-29 | 1952-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-30 | 1955-09-29 | 1956-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-30 | 1959-09-29 | 1960-03-30 | $7700.00 | Window Closed / Lapsed |