Patent US2422794A successfully refreshed from Google Patents.
US2422794A
Expired / Lapsed
US
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Extraction of saponifiable acids
Assignee: Sunoco Inc
•
Filing: 1943-02-09
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Granted: 1947-06-24
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Expires: 1963-02-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Wilmer E Mccorquodale
- 👤 Lloyd G Magill
- 👤 James D Hagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:28
CPC Classifications
C; C07; C07C; C07C309/00; C07C309/01; C07C309/62
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1694461A
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US1886647A
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US1828356A
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US1984432A
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US2220013A
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US2131938A
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US2288769A
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US2136608A
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US2251819A
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US2322012A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-06-23 | 1950-12-23 | 1951-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-06-23 | 1954-12-23 | 1955-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-06-23 | 1958-12-23 | 1959-06-24 | $7700.00 | Window Closed / Lapsed |