US2852483A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of plasticizing a polyurethane-polyether and composition thereby obtained
Assignee: Armstrong World Industries Inc
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Filing: 1956-02-20
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Granted: 1958-09-16
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Expires: 1976-02-20
Abstract
No abstract record available.
Inventors
- 👤 William L Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 11:40
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/65; C08G18/66; C08G18/6666; C08G18/667; C08G18/6674; C08G18/08; C08G18/10; C08G18/12; C08G18/40; C08G18/48; C08G18/4854
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
THE METHOD OF PLASTICIZING A STABLE HYDROXYLTERMINATED POLYURETHANE-POLYETHER WHICH IS THE REACTION PRODUCT OF RING-OPENED TETRAHYDROFURANE, A POLYHYDROXYL ALCOHOL, AND A SYMMETRICAL POLYCYCLIC AROMATIC DIISOCYANATE, WHICH COMPRISES INTIMATELY MIXING RELATIVE PROPORTIONS OF ABOUT 100 PARTS BY WEIGHT OF SAID POLYURETHANE-POLYETHER WITH ABOUT 5-60 PARTS BY WEIGHT OF AN ISOCYANATO-TERMINATED POLYURETHANE HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500-4,500 AND HAVING A VISCOSITY IN THE RANGE OF ABOUT 1,000-20,000 CENTIPOISES AT 70*C., SAID ISOCYANATO-TERMINATED POLYURETHANE BEING THE REACTION PRODUCT OF AN ORGANIC DIISOCYANATE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) A POLYETHER RESULTING FROM THE RING-OPENING OF TETRAHYDROFURANE AND (2) A POLYESTER WHICH IS THE REACTION PRODUCT OF A SATURATED DICARBOXYLIC ACID AND A POLYHYDROXY ALCOHOL.
Claim 2
Independent Claim
120 words
THE METHOD OF PLASTICIZING A STABLE HYDROXYLTERMINATED POLYURETHANE-POLYETHER WHICH IS THE REACTION PRODUCT OF RING-OPENED TETRAHYDROFURANE, A POLYHYDROXYL ALCOHOL, AND A SYMMETRICAL POLYCYCLIC AROMATIC DIISOCYANATE, WHICH COMPRISES INTIMATELY MIXING RELATIVE PROPORTIONS OF ABOUT 100 PARTS BY WEIGHT OF SAID POLYURETHANE-POLYETHER WITH ABOUT 5-60 PARTS BY WEIGHT OF AN ISOCYANATO-TERMINATED POLYURETHANE HAVING A MOLECULAR WEIGHT IN THE RANGE OF ABOUT 1,500-4,500 AND HAVING A VISCOSITY IN THE RANGE OF ABOUT 1,000-20,000 CENTIPOISES AT 70*C., SAID ISOCYANATO-TERMINATED POLYURETHANE BEING THE REACTION PRODUCT OF AN ORGANIC DIISOCYANATE AND A COMPOUND SELECTED FROM THE GROUP CONSISTING OF (1) A POLYETHER RESULTING FROM THE RING-OPENING OF TETRAHYDROFURANE AND (2) A POLYESTER WHICH IS THE REACTION PRODUCT OF A SATURATED DICARBOXYLIC ACID AND A POLYHYDROXY ALCOHOL.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-09-15 | 1962-03-17 | 1962-09-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-15 | 1966-03-17 | 1966-09-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-15 | 1970-03-17 | 1970-09-16 | $7700.00 | Window Closed / Lapsed |