Patent US2980749A successfully refreshed from Google Patents.
Patent US3793236A successfully refreshed from Google Patents.
US3793236A
Expired / Lapsed
US
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Oxazolidone-modified isocyanurate resins
Assignee: Mitsubishi Chemical Corp
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Filing: 1971-02-12
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Granted: 1974-02-19
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Expires: 1991-02-12
Abstract
Abstract RESINS HAVING A POLYISOCYANURATE STRUCTURE ARE PRODUCED BY TRIMERIZING AN ISOCYANATE-TERMINATED POLYOXAZOLIDONE BY MEANS OF A TRIMERIZATION CATALYST SUCH AS A TERTIARY AMINE. FOAMED RESIN OF THE FOREGOING TYPE EXHIBIT UNEXPECTEDLY LOW FRIABILITY AND HIGH FLAME RESISTIVITY, AND THUS ARE USEFUL AS BUILDING MATERIALS AND FOR OTHER APPLICATIONS REQUIRING A COMBINATION OF HIGH HEAT AND FLAME RESISTANCE. THESE RESINS ARE ALSO USEFUL AS COATINGS, ADHESIVES, ELASTOMER, AND THE LIKE.
Inventors
- 👤 K Ashida
- 👤 K Frisch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/02; C08G18/022; C08G18/003; C08G18/06; C08G18/08; C08G18/09; C08G18/092; C08G2110/00; C08G2110/0041; C08G2110/005; C08G2110/0058; Y; Y10; Y10S; Y10S521/00; Y10S521/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-02-18 | 1977-08-20 | 1978-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-02-18 | 1981-08-20 | 1982-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-02-18 | 1985-08-20 | 1986-02-19 | $7700.00 | Window Closed / Lapsed |