US3707527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trifunctional isocyanates prepared from triglycidyl isocyanurate and diisocyanates
Assignee: Henkel AG and Co KGaA
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Filing: 1970-12-16
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Granted: 1972-12-26
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Expires: 1990-12-16
Abstract
Abstract TRIFUNCTIONAL ISOCYANATES PREPARED BY THE REACTION OF CRYSTALINE TRIGLYCIDYL ISOCYANURATE HAVING AN EPOXIDE OXYGEN CONTENT IN EXCESS OF 14% WITH 1 MOL FOR EACH EPOXIDE OXYGEN IN SAID CRYSTALINE TRIGLYCIDYL ISOCYANURAATE, OF AN ORGANIC DIISOCYANATE FREE OF OTHER SUBSTITUENTS CAPABLE OF REACTING WITH IPOXIDE OXYGEN UNDER ANHYDROUS CONDITIONS AT A TEMPERATURE ABOVE 100*C. AND BELOW THE DECOMPOSITION TEMPERATURE OF THE REACTANTS. THE INVENTION ALSO RELATES TO THE METHOD OF PREPARING THE TRIFUNCTIONAL ISOCYANATES AND THE USE OF THE SAME AS HARDENABLE COMPOUNDS.
Inventors
- 👤 Manfred Budnowski
- 👤 Edgar Lieske
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:22
CPC Classifications
C; C07; C07C; C07C265/00; C08; C08G; C08G18/00; C08G18/003
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |