Patent US3496159A successfully refreshed from Google Patents.
US3496159A
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Esterification of fatty acids of tall oil in a horizontal distillation column and condenser
Assignee: Spence & Green Chem Co
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Filing: 1967-03-27
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Granted: 1970-02-17
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Expires: 1987-03-27
Abstract
No abstract record available.
Inventors
- 👤 Andrew Spence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 03:44
CPC Classifications
C; C11; C11C; C11C3/00; C11C3/003; C09; C09F; C09F1/00; C11C3/04; Y; Y10; Y10S; Y10S203/00; Y10S203/19
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2311386A
Cited
US2446997A
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US2515090A
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US2485744A
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US2614973A
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US2724709A
Cited
US2916527A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-02-16 | 1973-08-18 | 1974-02-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-02-16 | 1977-08-18 | 1978-02-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-02-16 | 1981-08-18 | 1982-02-17 | $7700.00 | Window Closed / Lapsed |