US2886492A
Expired / Lapsed
US
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Tall oil fractionating process
Assignee: Crosby Chemicals Inc
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Filing: 1956-07-17
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Granted: 1959-05-12
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Expires: 1976-07-17
Abstract
No abstract record available.
Inventors
- 👤 Elwood W Hanson
- 👤 Drew John
- 👤 Cagnolatti Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 23:57
CPC Classifications
C; C11; C11B; C11B13/00; C11B13/005; Y; Y02; Y02W; Y02W30/00; Y02W30/50; Y02W30/74
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
69 words
THE PROCESS OF FRACTIONING TALL OIL WHICH INCLUDES THE CONTINUOUS AND UNINTERRUPTED STEPS OF REMOVING PITCH AND ODOROUS GASES FROM CRUDE TALL OIL BY A FRACTIONAL DISTILLATION TO OBTAIN REFINED TALL OIL, REMOVING ROSIN FROM SAID REFINED TALL OIL BY FRACTIONAL DISTILLATION TO OBTAIN A MIXTURE OF FATTY ACIDS AND ROSIN ACIDS, AND SEPARATING THE FATTY ACIDS FROM THE ROSIN ACIDS BY SUBJECTING SAID MIXTURE TO FURTHER FRACTIONAL DISTILLATIONS.
Claim 2
Dependent Claim
69 words
THE PROCESS OF FRACTIONING TALL OIL WHICH INCLUDES THE CONTINUOUS AND UNINTERRUPTED STEPS OF REMOVING PITCH AND ODOROUS GASES FROM CRUDE TALL OIL BY A FRACTIONAL DISTILLATION TO OBTAIN REFINED TALL OIL, REMOVING ROSIN FROM SAID REFINED TALL OIL BY FRACTIONAL DISTILLATION TO OBTAIN A MIXTURE OF FATTY ACIDS AND ROSIN ACIDS, AND SEPARATING THE FATTY ACIDS FROM THE ROSIN ACIDS BY SUBJECTING SAID MIXTURE TO FURTHER FRACTIONAL DISTILLATIONS.
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) | 1962-05-11 | 1962-11-10 | 1963-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-05-11 | 1966-11-10 | 1967-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-05-11 | 1970-11-10 | 1971-05-12 | $7700.00 | Window Closed / Lapsed |