Patent US3640938A successfully refreshed from Google Patents.
US3640938A
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Polyurethane composition and its use to form polystyrene laminates
Assignee: Goodyear Tire and Rubber Co
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Filing: 1969-01-31
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Granted: 1972-02-08
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Expires: 1989-01-31
Abstract
Abstract THIS INVENTION RELATES TO POLYURETHANE COMPOSITIONS AND TO A METHOD OF APPLYING POLYURETHANE COATINGS TO POLYSTYRENE TO PRODUCE IAMINATES. THE POLYURETHANE COMPOSITIONS ARE THE REACTION PRODUCT OF A REACTIVE HYDROGEN CONTAINING MATERIAL OF 400 TO ABOUT 12,000 MOLECULAR WEIGHT, AN ORGANIC POLYISOCYANATE AND A CURATIVE WHICH HAS BEEN DISPERSED IN A SOLVENT WHICH DOES NOT AFFECT THE SURFACE OF THE POLYSTYRENE, THE SOLVENT BEING DIACETONE ALCOHOL.
Inventors
- 👤 Anthony F Finelli
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:49
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0847; C08G18/0852; C08J; C08J7/00; C08J7/04; C08J7/0427; C09; C09D; C09D175/00; C09D175/04; C08J2325/00; C08J2325/02; C08J2325/04; C08J2325/06; C08J2475/00; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/31504; Y10T428/31551; Y10T428/31573; Y10T428/31587
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) | 1975-02-07 | 1975-08-09 | 1976-02-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-02-07 | 1979-08-09 | 1980-02-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-02-07 | 1983-08-09 | 1984-02-08 | $7700.00 | Window Closed / Lapsed |