Patent US2565484A successfully refreshed from Google Patents.
US2565484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fractionation of tall oil
Assignee: Armstrong World Industries Inc
•
Filing: 1949-03-15
•
Granted: 1951-08-28
•
Expires: 1969-03-15
Abstract
No abstract record available.
Inventors
- 👤 Lawrence H Dunlap
- 👤 Carl F Sievert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:11
CPC Classifications
C; C09; C09F; C09F1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A METHOD OF FRACTIONATING TALL OIL TO OBTAIN A FRACTION SUBSTANTIALLY COMPLETELY FREE FROM SATURATED FATTY ACIDS WHICH COMPRISES OXIDIZING TALL OIL UNTIL A PRODUCT HAVING A VISCOSITY OF BETWEEN ABOUT 15 TO ABOUT 250 SECONDS AT 25* C. IS OBTAINED, REMOVING SATURATED FATTY ACIDS FROM THE RESULTING MATERIAL BY MEANS OF A NONPOLAR SOLVENT, AND RECOVERING AN OXIDIZED SATURATED-FATTY-ACID-FREE TALL OIL FRACTION AS RESIDUE.
Claim 2
Independent Claim
65 words
A METHOD OF FRACTIONATING TALL OIL TO OBTAIN A FRACTION SUBSTANTIALLY COMPLETELY FREE FROM SATURATED FATTY ACIDS WHICH COMPRISES OXIDIZING TALL OIL UNTIL A PRODUCT HAVING A VISCOSITY OF BETWEEN ABOUT 15 TO ABOUT 250 SECONDS AT 25* C. IS OBTAINED, REMOVING SATURATED FATTY ACIDS FROM THE RESULTING MATERIAL BY MEANS OF A NONPOLAR SOLVENT, AND RECOVERING AN OXIDIZED SATURATED-FATTY-ACID-FREE TALL OIL FRACTION AS RESIDUE.
References Cited (Backward Citations)
US1938532A
Cited
DE722247C
Cited
US2305498A
Cited
US2373978A
Cited
US2354812A
Cited
US2432333A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-08-27 | 1955-02-26 | 1955-08-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-08-27 | 1959-02-26 | 1959-08-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-08-27 | 1963-02-26 | 1963-08-28 | $7700.00 | Window Closed / Lapsed |