Patent US3697480A successfully refreshed from Google Patents.
US3697480A
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Process for the manufacture of ester resins containing isocyanurate groups and imide groups
Assignee: Dynamit Nobel AG
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Filing: 1970-05-14
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Granted: 1972-10-10
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Expires: 1990-05-14
Abstract
Abstract PROCESS OF PRODUCING ESTER RESIN CONTAINING ISOCYANURATE GROUPS AND IMIDE GROUPS IN THE POLYMER CHAIN COMPRISING CONDENSING A POLYALCOHOL WITH A TRICARBOXYLIC ACID OF THE FORMULA: 1,3,5-TRI(R-),2,4,6-TRI(O=)HEXAHYDRO-S-TRIAZINE WHEREIN R REPRESENTS A MOIETY HAVING THE FORMULA: (CH3-),(5-(HOOC-),1,3-DI(O=)-ISOINDOLIN-2-YL)PHENYL CHARACTERIZED BY THE STEP OF FORMING SAID TRICARBOXYLIC ACID BY CONTACTING TRIPHENOLIC URETHANE TRIMERIZED TOLUYLENE DIISOCYANATE AND TRIMELLITIC ACID ANHYDRODE IN A MEDIUM CONTAINING THE POLYALCOHOL, AT A TEMPERATURE AND FOR A TIME SUFFICIENT FOR FORMATION OF SAID TRICARBOXLIC ACID.
Inventors
- 👤 Gerhard Schade
- 👤 Franz Blaschke
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:05
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/70; C08G18/72; C08G18/77; C08G18/78; C08G18/79; C08G18/791; C08G18/794; C08G18/28; C08G18/30; C08G18/34; C08G18/343; C08G18/345; C08G63/00; C08G63/68; C08G63/685; C08G63/6854
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |