US3702777A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for catalyzing polyurea coatings
Assignee: SCM Corp
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Filing: 1970-10-15
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Granted: 1972-11-14
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Expires: 1990-10-15
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 LOWER HYDROCARBYL SUBSTITUTED 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 LOWER HYDROCARBYL SUBSTITUTED CHLOROPHENOL.
Inventors
- 👤 James W Watson
- 👤 Billy D Payne
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 13:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/16; C08G18/166; C08G18/168; C08G18/28; C08G18/30; C08G18/32; C08G18/3225; C08G18/3253; C08G18/3256; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31551; Y10T428/31554; Y10T428/31591; Y10T428/31594; Y10T428/31942; Y10T428/31949; Y10T428/31957
Claims Analysis
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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) | 1975-11-14 | 1976-05-15 | 1976-11-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-11-14 | 1980-05-15 | 1980-11-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-11-14 | 1984-05-15 | 1984-11-14 | $7700.00 | Window Closed / Lapsed |