Patent US2965615A successfully refreshed from Google Patents.
US2965615A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyurethanes and their preparation
Assignee: Shell USA Inc
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Filing: 1958-04-03
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Granted: 1960-12-20
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Expires: 1978-04-03
Abstract
No abstract record available.
Inventors
- 👤 Roy W Tess
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:56
CPC Classifications
C; C08; C08F; C08F8/00; C08F8/30; C08G; C08G18/00; C08G18/06; C08G18/28; C08G18/40; C08G18/62; C08G18/6212
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
A POLYURETHANE RESIN COMPRISING THE PRODUCT OBTAINED BY MIXING AND REACTING AN ISOCYANATE OF THE GROUP CONSISTING OF ORGANIC POLYISOCYANATES AND ORGANIC POLYISOTHIOCYANATES WITH A RESINOUS POLYOL COMPRISING A MEMBER OF THE GROUP CONSISTING OF (1) COPOLYMERS OF ALLYL ALCOHOL AND 15% TO 90% BY WEIGHT OF AN ALKENYLSUBSTITUTED AROMATIC COMPOUND OF THE GROUP CONSISTING OF STYRENE, P-CHLOROSTYRENE, ALPHA-METHYLSTYRENE, P-METHOXYSTYRENE, P-BUTYLSTYRENE, P-OCTYLSTYRENE, VINYL TOLUENE, 2,5-DIBUTYLSTYRENE, BETA-VINYLNAPHTHALENE AND 2,4-DICHLOROSTYRENE AND (2) REACTION PRODUCTS OF THE SAID COPOLYMERS OF ALLYL ALCOHOL AND THE ALKENYL-SUBSTITUTED AROMATIC COMPOUND WITH UP TO 30%, BASED ON THE WEIGHT OF THE COPOLYMER, OF AN ALKYLENE OXIDE OF THE GROUP CONSISTING OF ETHYLENE OXIDE AND PROPYLENE OXIDE, THE RESINOUS POLYOL AND THE ISOCYANATE BEING COMBINED IN A CHEMICALLY EQUIVALENT RATIO VARYING FROM 4:1 TO 1:4.
Claim 2
Dependent Claim
127 words
A POLYURETHANE RESIN COMPRISING THE PRODUCT OBTAINED BY MIXING AND REACTING AN ISOCYANATE OF THE GROUP CONSISTING OF ORGANIC POLYISOCYANATES AND ORGANIC POLYISOTHIOCYANATES WITH A RESINOUS POLYOL COMPRISING A MEMBER OF THE GROUP CONSISTING OF (1) COPOLYMERS OF ALLYL ALCOHOL AND 15% TO 90% BY WEIGHT OF AN ALKENYLSUBSTITUTED AROMATIC COMPOUND OF THE GROUP CONSISTING OF STYRENE, P-CHLOROSTYRENE, ALPHA-METHYLSTYRENE, P-METHOXYSTYRENE, P-BUTYLSTYRENE, P-OCTYLSTYRENE, VINYL TOLUENE, 2,5-DIBUTYLSTYRENE, BETA-VINYLNAPHTHALENE AND 2,4-DICHLOROSTYRENE AND (2) REACTION PRODUCTS OF THE SAID COPOLYMERS OF ALLYL ALCOHOL AND THE ALKENYL-SUBSTITUTED AROMATIC COMPOUND WITH UP TO 30%, BASED ON THE WEIGHT OF THE COPOLYMER, OF AN ALKYLENE OXIDE OF THE GROUP CONSISTING OF ETHYLENE OXIDE AND PROPYLENE OXIDE, THE RESINOUS POLYOL AND THE ISOCYANATE BEING COMBINED IN A CHEMICALLY EQUIVALENT RATIO VARYING FROM 4:1 TO 1:4.
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) | 1963-12-20 | 1964-06-20 | 1964-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-12-20 | 1968-06-20 | 1968-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-12-20 | 1972-06-20 | 1972-12-20 | $7700.00 | Window Closed / Lapsed |