Patent US3401133A successfully refreshed from Google Patents.
US3401133A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Film-forming polyurethane latices
Assignee: Wyandotte Chemicals Corp
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Filing: 1965-08-24
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Granted: 1968-09-10
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Expires: 1985-08-24
Abstract
No abstract record available.
Inventors
- 👤 Oscar M Grace
- 👤 Jr James M Mcclellan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:50
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/48; C08G18/50; C08G18/5072; C08G18/08; C08G18/0838; C08G18/0842; C08G18/0861; C08G18/0866; C08G18/10; C08G18/4804; C08G18/4812; C08G18/4829
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
FILM-FORMING POLYURETHANE LATICES OBTAINED BY THE CHAIN EXTENSION OF AN NCO-TERMINATED PREPPOLYMER PREPARED BY THE REACTION OF AN ORGANIC DIISOCYANATE WITH A POLYALKYLENE ETHER POLYOL HAVING A FUNCTIONALITY GREATER THAN TWO AND AN WQUIVALENT WEIGHT BETWEEN 500 AND 2500 SAID POLYOL PREPARED FROM AN ALKYLENE OXIDE HAVING AT LEAST 3 CARBON ATOMS OR A MIXTURE OF ALKYLENE OXIDES CONTAINING AT LEAST 50% BY WEIGHT OF AN ALKYLENE OXIDE HAVING AT LEAST 3 CARBON ATOMS WITH A MIXTURE OF AN ORGANIC COMPOUND HAVING ONE ACTIVE HYDROGEN ATOM AND AN ORGANIC COMPOUND HAVING AT LEAST TWO ACTIVE HYDROGEN ATOMS, SAID MIXTURE COMPRISING FROM 0.05 TO 0.5 EQUIVALENT PER EQUIVALENT OF ISOCYANATE OF AN ORGANIC COMPOUND HAVING ONE ACTIVE HYDROGEN ATOM.
Claim 2
Dependent Claim
118 words
FILM-FORMING POLYURETHANE LATICES OBTAINED BY THE CHAIN EXTENSION OF AN NCO-TERMINATED PREPPOLYMER PREPARED BY THE REACTION OF AN ORGANIC DIISOCYANATE WITH A POLYALKYLENE ETHER POLYOL HAVING A FUNCTIONALITY GREATER THAN TWO AND AN WQUIVALENT WEIGHT BETWEEN 500 AND 2500 SAID POLYOL PREPARED FROM AN ALKYLENE OXIDE HAVING AT LEAST 3 CARBON ATOMS OR A MIXTURE OF ALKYLENE OXIDES CONTAINING AT LEAST 50% BY WEIGHT OF AN ALKYLENE OXIDE HAVING AT LEAST 3 CARBON ATOMS WITH A MIXTURE OF AN ORGANIC COMPOUND HAVING ONE ACTIVE HYDROGEN ATOM AND AN ORGANIC COMPOUND HAVING AT LEAST TWO ACTIVE HYDROGEN ATOMS, SAID MIXTURE COMPRISING FROM 0.05 TO 0.5 EQUIVALENT PER EQUIVALENT OF ISOCYANATE OF AN ORGANIC COMPOUND HAVING ONE ACTIVE HYDROGEN ATOM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |