US2935517A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alkali refining of epoxy plashcizers
Assignee: —
•
Filing: —
•
Granted: 1960-05-03
•
Expires: 1977-05-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:34
CPC Classifications
C; C07; C07D; C07D301/00; C07D301/32; C07D303/00; C07D303/02; C07D303/38; C07D303/40; C08; C08G; C08G59/00; C08G59/02; C08G59/027; C08K; C08K5/00; C08K5/0008; C08K5/0016; C08K5/04; C08K5/15; C08K5/151; C08K5/1515
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
METHOD OF STABILIZING AN EPOXY FATTY ESTER PLASTICIZER AGAINST DEGRADATION UPON EXPOSURE TO ELEVATED TEMPERATURES. SAID PLASTICIZER HAVING BEEN PREPARED BY SULFURIC ACID CATALYZED IN SITU PERACETIC ACID EXPOXIDATION OF AN ESTER OF A HIGHER UNSATURATED FATTY ACID AND A SATURATED ALIPHATIC HYDROXY COMPOUND, WHICH METHOD COMPRISES HEATING SAID PLASTICIZER AT ABOUT 30*-100*C. IN THE SUBSTANTIAL ABSENCE OF WATER AND IN THE PRESENCE OF A SOLID PARTICULATE ALKALI FROM THE GROUP CONSISTING OF THE HYDROXIDES OF SODIUM, POTASSIUM, CALCIUM AND BARIUM.
Claim 2
Dependent Claim
81 words
METHOD OF STABILIZING AN EPOXY FATTY ESTER PLASTICIZER AGAINST DEGRADATION UPON EXPOSURE TO ELEVATED TEMPERATURES. SAID PLASTICIZER HAVING BEEN PREPARED BY SULFURIC ACID CATALYZED IN SITU PERACETIC ACID EXPOXIDATION OF AN ESTER OF A HIGHER UNSATURATED FATTY ACID AND A SATURATED ALIPHATIC HYDROXY COMPOUND, WHICH METHOD COMPRISES HEATING SAID PLASTICIZER AT ABOUT 30*-100*C. IN THE SUBSTANTIAL ABSENCE OF WATER AND IN THE PRESENCE OF A SOLID PARTICULATE ALKALI FROM THE GROUP CONSISTING OF THE HYDROXIDES OF SODIUM, POTASSIUM, CALCIUM AND BARIUM.
References Cited (Backward Citations)
US2801253A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-05-03 | 1963-11-02 | 1964-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-05-03 | 1967-11-02 | 1968-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-05-03 | 1971-11-02 | 1972-05-03 | $7700.00 | Window Closed / Lapsed |