US3554962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Light stable polyurethanes
Assignee: Uniroyal Chemical Co Inc
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Filing: 1968-03-29
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Granted: 1971-01-12
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Expires: 1988-03-29
Abstract
Abstract LIGHT STABLE POLYURETHANE PREPOLYMER COMPOSITIONS CONTAINING (A) POLYETHER POLYURETHANE PREPOLYMER MADE FROM AROMATIC DIISOCYANATE (E.G. TDI), (B) POLYETHER POLYURETHANE PREPOLYMER MADE FROM "HYDROGENATED MD," I.E., 4,4''-METHYLENEBIS (CYCLOHEXYLISOCYANATE), (C) ULTRAVIOLET LIGHT SCREENING AGENT, AND (D) ANTIOXIDANT. THE PREPOLYMER COMPOSITIONS PRODUCE LIGHT STABLE PRODUCTS EVEN WHEN CURED WITH DIAMINE CURVATIVES WHICH NORMALLY PRESENT A LIGHT STABILITY PROBLEM, SUCH AS MOCA (4,4''-METHYLENEBIS(ORTHO-CHLOROANILINE)).
Inventors
- 👤 William K Fischer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; C08G18/12; C08G18/70; C08G18/72; C08G18/721; C08G18/724; C08K; C08K5/00; C08K5/0008; C08K5/005
Claims Analysis
Total Claims: 0
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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) | 1974-01-11 | 1974-07-13 | 1975-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-11 | 1978-07-13 | 1979-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-11 | 1982-07-13 | 1983-01-12 | $7700.00 | Window Closed / Lapsed |