US2736716A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of polymeric products from styrene and unsaturated fatty compounds
Assignee: Oxirane Ltd
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Filing: 1952-01-31
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Granted: 1956-02-28
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Expires: 1972-01-31
Abstract
No abstract record available.
Inventors
- 👤 Lowe Arnold John
- 👤 Butler Donald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:58
CPC Classifications
C; C08; C08F; C08F212/00; C08F212/02; C08F212/04; C08F212/06; C08F212/08; C08F242/00; C09; C09D; C09D125/00; C09D125/02; C09D125/04; C09D125/08; C09D125/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
A PROCESS FOR THE PRODUCTION OF POLYMERIC PRODUCTS FROM STYRENE AND UNSATURATED FATTY COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF DRYING OIL UNSATURATED FATTY ACIDS, AND PARTIAL AND FULL ESTERS OF POLYHYDRIC ALCOHOLS AND SAID ACIDS, WHICH COMPRISES CONTINUOUSLY PASSING A REACTION MIXTURE OF STYRENE AND AT LEAST ONE OF SAID UNSATURATED FATTY COMPOUNDS, IN WHICH THE RATIO BY WEIGHT OF STYRENE TO FATTY COMPOUNDS IS FROM ABOUT 6:4 TO 4:6, THROUGH A REACTION ZONE INITIALLY HEATED TO A TEMPERATURE OF FROM ABOUT 210 TO 270* C. AND MAINTAINED AT THIS TEMPERATURE BY THE APPLICATION OF COOLING TO REMOVE HEAT DEVELOPED DURING THE REACTION, UNDER A PRESSURE AT LEAST SUFFICIENT TO MAINTAIN THE REACTION MIXTURE IN THE LIQUID STATE, THE CONTACT TIME WITHIN THE REACTION ZONE VARYING INVERSELY WITH THE TEMPERATURE AND RANGING FROM ABOUT 5 TO ABOUT 10 MINUTES AT 270* C. TO ABOUT 60 TO ABOUT 120 MINUTES AT 210* C., AND BEING SUCH THAT FROM ABOUT 30 TO 90% BY WEIGHT OF THE STYRENE IS REACTED.
Claim 2
Dependent Claim
169 words
A PROCESS FOR THE PRODUCTION OF POLYMERIC PRODUCTS FROM STYRENE AND UNSATURATED FATTY COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF DRYING OIL UNSATURATED FATTY ACIDS, AND PARTIAL AND FULL ESTERS OF POLYHYDRIC ALCOHOLS AND SAID ACIDS, WHICH COMPRISES CONTINUOUSLY PASSING A REACTION MIXTURE OF STYRENE AND AT LEAST ONE OF SAID UNSATURATED FATTY COMPOUNDS, IN WHICH THE RATIO BY WEIGHT OF STYRENE TO FATTY COMPOUNDS IS FROM ABOUT 6:4 TO 4:6, THROUGH A REACTION ZONE INITIALLY HEATED TO A TEMPERATURE OF FROM ABOUT 210 TO 270* C. AND MAINTAINED AT THIS TEMPERATURE BY THE APPLICATION OF COOLING TO REMOVE HEAT DEVELOPED DURING THE REACTION, UNDER A PRESSURE AT LEAST SUFFICIENT TO MAINTAIN THE REACTION MIXTURE IN THE LIQUID STATE, THE CONTACT TIME WITHIN THE REACTION ZONE VARYING INVERSELY WITH THE TEMPERATURE AND RANGING FROM ABOUT 5 TO ABOUT 10 MINUTES AT 270* C. TO ABOUT 60 TO ABOUT 120 MINUTES AT 210* C., AND BEING SUCH THAT FROM ABOUT 30 TO 90% BY WEIGHT OF THE STYRENE IS REACTED.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |