US3560246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for catalyzing polyurea coatings
Assignee: SCM Corp
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Filing: 1968-04-26
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Granted: 1971-02-02
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Expires: 1988-04-26
Abstract
Abstract A NOVEL METHOD FOR CATALYZING THE FORMATION OF POLYUREA BY THE REACTIONS BETWEEN POLYFUNCTIONAL-ISOCYANATES AND POLYFUNCTIONAL-IMINES THROUGH THE PRESENCE OF AN EFFECTIVE AMOUNT OF A PHENOLIC CATALYST IS PROVIDED. ONE PARTICULARLY IMPORTANT EMBODIMENT COMPRISES THE FORMATION OF POLYUREA FILM COATINGS ON WOOD SUBSTRATES BY REACTING ALKYLENE DIISOCYANATES AND ALKYLENE DIIMINES IN THE PRESENCE OF A CHLORO-SUBSTITUTED PHENOL.
Inventors
- 👤 Billy D Payne
- 👤 James W Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:04
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3256; C08G18/08; C08G18/16; C08G18/166; C08G18/168
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) | 1974-02-01 | 1974-08-03 | 1975-02-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-01 | 1978-08-03 | 1979-02-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-01 | 1982-08-03 | 1983-02-02 | $7700.00 | Window Closed / Lapsed |