Patent US2992239A successfully refreshed from Google Patents.
US2992239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparing glycidyl esters of higher fatty acids
Assignee: Wyeth Holdings LLC
•
Filing: 1957-08-01
•
Granted: 1961-07-11
•
Expires: 1977-08-01
Abstract
No abstract record available.
Inventors
- 👤 Charles S Nevin
- 👤 John H Fletcher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:05
CPC Classifications
C; C07; C07D; C07D303/00; C07D303/02; C07D303/12; C07D303/16; C11; C11C; C11C3/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A METHOD OF PREPARING A GLYCIDYL ESTER OF LONG CHAIN FATTY ACIDS WHICH COMPRISES: FORMING A MIXTURE COMPRISING A MOLTEN FATTY ACID CONTAINING AT LEAST TEN CARBON ATOMS, AN ALKALI-METAL CARBONATE, AND A QUATERNARY AMMONIUM HALIDE CATALYST IN ABOUT THE MOL RATIOS OF 1.0:1.0-1.5:0.0025-0.01, RESPECTIVELY; ADDING THERETO FROM ABOUT 9 TO ABOUT 13 MOLES OF EPICHLOROHYDRIN PER MOL OF FATTY ACID; MAINTAINING RESULTANT MIXTURE AT A TEMPERATURE ABOVE THE MELTING POINT OF THE FATTY ACID UNTIL REACTION SUBSTANTIALLY CEASES, WHEREBY SAID ESTER IS FORMED, AND RECOVERING PRODUCT GLYCIDYL ESTER OF SAID FATTY ACID FROM RESULTANT SOLUTION.
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) | 1964-07-10 | 1965-01-09 | 1965-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-10 | 1969-01-09 | 1969-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-10 | 1973-01-09 | 1973-07-11 | $7700.00 | Window Closed / Lapsed |