US3271352A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethane coating from mixed polyurethane polymers
Assignee: Permacel
•
Filing: 1965-03-09
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Granted: 1966-09-06
•
Expires: 1985-03-09
Abstract
No abstract record available.
Inventors
- 👤 Weinberg Marvin Alfred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 16:20
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/088; C08G18/0885; C08G18/10; C08G18/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A VARNISH COMPOSITION COMPRISING A VARNISH BASE COMPRISING THE COMBINATION OF A SOLID ISOCYANATO TERMINATED POLYETHER POLYURETHANE RESIN AND FROM 3 TO 50% BY WEIGHT OF SAID COMBINATION OF AN ISOCYANATO TERMINATED POLYETHER POLYURETHANE LIQUID PRE-ELASTOMER, SAID RESIN HAVING BY WEIGHT 4 TO 15% ISOCYANATO GROUPS AND BEING THE REACTION PRODUCT OF A DISSOCYANATE AND A MIXTURE OF DIOLS AND TRIOLS HAVING AN AVERAGE OF APPROXIMATELY2.5 TO 2.67 HYDROXYL GROUPS PER MOLE, AT LEAST 50 MOLE PERCENT OF SAID DIOLS BEING A POLYPROPYLENE ETHER GLYCOL, AND SAID PRE-ELASTOMER HAVING BY WEIGHT 2 TO 9% ISOCYANATO GROUPS AND BEING THE REACTION PRODUCT OF A DIISOCYANATE AND A POLYTETRAMETHYLENE ETHER GLYCOL HAVING AN AVERAGE OF APPROXIMATELY 2 HYDROXYL GROUPS PER MOLE.
Claim 2
Dependent Claim
119 words
A VARNISH COMPOSITION COMPRISING A VARNISH BASE COMPRISING THE COMBINATION OF A SOLID ISOCYANATO TERMINATED POLYETHER POLYURETHANE RESIN AND FROM 3 TO 50% BY WEIGHT OF SAID COMBINATION OF AN ISOCYANATO TERMINATED POLYETHER POLYURETHANE LIQUID PRE-ELASTOMER, SAID RESIN HAVING BY WEIGHT 4 TO 15% ISOCYANATO GROUPS AND BEING THE REACTION PRODUCT OF A DISSOCYANATE AND A MIXTURE OF DIOLS AND TRIOLS HAVING AN AVERAGE OF APPROXIMATELY2.5 TO 2.67 HYDROXYL GROUPS PER MOLE, AT LEAST 50 MOLE PERCENT OF SAID DIOLS BEING A POLYPROPYLENE ETHER GLYCOL, AND SAID PRE-ELASTOMER HAVING BY WEIGHT 2 TO 9% ISOCYANATO GROUPS AND BEING THE REACTION PRODUCT OF A DIISOCYANATE AND A POLYTETRAMETHYLENE ETHER GLYCOL HAVING AN AVERAGE OF APPROXIMATELY 2 HYDROXYL GROUPS PER MOLE.
References Cited (Backward Citations)
CA665361A
Cited
US3012987A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |