US3586649A
Expired / Lapsed
US
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Polyurethane foam structures with integral skin of improved properties and method of making
Assignee: Aerojet Rocketdyne Holdings Inc
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Filing: 1968-12-12
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Granted: 1971-06-22
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Expires: 1988-12-12
Abstract
Abstract NON-RIGID POLYURETHANE FOAM STRUCTURES HAVING AN INTEGRAL SKIN TO WHICH SURFACE COATINGS MAY BE APPLIED THAT WILL NOT DISCOLOR ON EXPOSURE TO ULTRAVIOLET LIGHT ARE MADE FROM POLYURETHANE FOAM SYSTEMS THAT CONTAIN A SUBSTITUTED ARYL DIAMINE, E.G., METHYLENE-BIS-ORTHOCHLOROANILINE, IN COMBINATION WITH A POLYOL PREPARED BY POLYMERIZING AN ETHYLENICALLY UNSATURATED MONOMER IN SITU IN AN ORGANIC POLYOL OF AT LEAST 400 MOLECULAR WEIGHT, E.G., ACRYLONITRILE POLYMERIZED IN SITU IN A POLYOXYALKYLENE ETHER TRIOL.
Inventors
- 👤 David S Cobbledick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:16
CPC Classifications
C; C08; C08J; C08J9/00; C08J9/34; B; B32; B32B; B32B27/00; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/63; C08G18/65; C08G18/6552; C08G18/6558; C08G18/657; C08G2110/00; C08G2110/0008; C08G2110/0016; C08G2110/0033; C08G2110/0041; C08G2110/0058; C08G2110/0066; C08J2375/00; Y; Y10; Y10S; Y10S264/00; Y10S264/14; Y10S521/00; Y10S521/904; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249984; Y10T428/249987; Y10T428/249988; Y10T428/249989; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31855; Y10T428/31935
Claims Analysis
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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) | 1974-06-21 | 1974-12-21 | 1975-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-06-21 | 1978-12-21 | 1979-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-06-21 | 1982-12-21 | 1983-06-22 | $7700.00 | Window Closed / Lapsed |