US3630973A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Low viscosity polyol blends and rigid polyurethane foams prepared therefrom
Assignee: Olin Corp
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Filing: 1970-03-24
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Granted: 1971-12-28
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Expires: 1990-03-24
Abstract
Abstract THE ADDITION OF SMALL AMOUNTS OF LOW-MOLECULARWEIGHT GLYCOLS TO HIGHLY VISCOUS POLYETHER POLYOLS PROVIDES POLYOL BLENDS HAVING REDUCED VISCOSITIES AND IMPROVED HANDLING CHARACTERISTICS. POLYURETHANE FOAMS HAVING DESIRABLE PHYSICAL PROPERTIES CAN BE PREPARED FROM THESE POLYOL BLENDS. SUCH POLYURETHANE FOAMS ARE OF UITILITY IN NUMEROUS APPLICATIONS INCLUDING INSULATION, CUSHIONING AND THE LIKE.
Inventors
- 👤 Alan E Ardis
- 👤 Milton Lapkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:35
CPC Classifications
C; C08; C08G; C08G65/00; C08G65/02; C08G65/26; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5003; C08G18/5006; C08G18/5009; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674
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) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |