US3291764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prepolymers from a polyamino compound and an epoxidized fatty acid ester
Assignee: JBS USA LLC
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Filing: 1965-07-30
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Granted: 1966-12-13
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Expires: 1985-07-30
Abstract
No abstract record available.
Inventors
- 👤 Thomas W Findley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 22:08
CPC Classifications
C; C08; C08G; C08G59/00; C08G59/18; C08G59/40; C08G59/50; C08G59/5006
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
116 words
A METHOD FOR PRODUCING A PREPOLYMER FROM A POLYAMINO COMPOUND HAVING AT LEAST TWO NONTERTIARY AMINO GROUPS AND AN EPOXIDIZED FATTY ACID ESTER OF A LOWER ALCOHOL WHICH COMPRISES: HEATING A MIXTURE OF 20-50 PARTS BY WEIGHT OF SAID POLYAMINO COMPOUND AND 100 PARTS BY WEIGHT OF AN EPOXIDIZED FATTY ACID ESTER OF A LOWER ALCOHOL, SAID ESTER HAVING AN OXIRANE OXYGEN CONTENT ABOVE ABOUT 6% AND HAVING NONTERMINAL EPOXY GROUPS, TO A TEMPERATURE OF ABOUT 60-90*C., CONTINUING SAID HEATING UNTIL THE REACTION MIXTURE BECOMES SOLUBLE IN A 1% EQUOUS SOLUTION OF ACID, COOLING SAID REACTION MIXTURE TO RETARD FURTHER POLYMERIZATION OF THE COMPONENTS, AND SUBSEQUENTLY DISSOLVING SAID REACTION MIXTURE IN AN AQUEOUS ACETIC ACID SOLUTION.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |