US3159608A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Copolymerization of ethylene and vinyl acetate
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1963-01-08
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Granted: 1964-12-01
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Expires: 1983-01-08
Abstract
No abstract record available.
Inventors
- 👤 Ilnyckyj Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 22:03
CPC Classifications
C; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
PROCESS FOR THE MANUFACTURE OF A POUR DEPRESSANT COMPRISING A COPOLYMER OF ETHYLENE AND VINYL ACETATE WHICH COMPRISES INTRODUCING ETHYLENE INTO A REACTION ZONE CONTAINING A PEROXY COMPOUND AND A BENZENE SOLVENT TO WHICH HAS BEEN ADDED FROM ABOUT 1-30% BY VOLUME OF TOLUENE, THEREAFTER RAISING THE TEMPERATURE OF SAID REACTION ZONE TO A TEMPERATURE IN THE RANGE FROM 280* TO 340*F. AND TO A PRESSURE IN THE RANGE FROM 1000 TO 5000 POUNDS PER SQ. IN., THEREAFTER ADDING TO SAID REACTION ZONE VINYL ACETATE AND SUFFICIENT ETHYLENE TO MAINTAIN THE PRESSURE IN SAID RANGE, CARRYING OUT SAID REACTION AT A TEMPERATURE IN THE RANGE FROM 280* TO 340*F. FOR A PERIOD OF FROM 2 TO 16 HOURS UNDER CONDITIONS WHEREIN THE CONCENTRATION OF THE VINYL ACETATE IN THE BENZENE SOLUTION VARIES FROM ABOUT 0.2 TO 10.0%, WHEREBY A POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE FROM ABOUT 1000 TO 3000 IS SECURED, WHEREIN THE CONCENTRATION OF THE VINYL ACETATE IN THE PRODUCT WILL VARY FROM ABOUT 15 TO 28% BY WEIGHT.
Claim 2
Dependent Claim
173 words
PROCESS FOR THE MANUFACTURE OF A POUR DEPRESSANT COMPRISING A COPOLYMER OF ETHYLENE AND VINYL ACETATE WHICH COMPRISES INTRODUCING ETHYLENE INTO A REACTION ZONE CONTAINING A PEROXY COMPOUND AND A BENZENE SOLVENT TO WHICH HAS BEEN ADDED FROM ABOUT 1-30% BY VOLUME OF TOLUENE, THEREAFTER RAISING THE TEMPERATURE OF SAID REACTION ZONE TO A TEMPERATURE IN THE RANGE FROM 280* TO 340*F. AND TO A PRESSURE IN THE RANGE FROM 1000 TO 5000 POUNDS PER SQ. IN., THEREAFTER ADDING TO SAID REACTION ZONE VINYL ACETATE AND SUFFICIENT ETHYLENE TO MAINTAIN THE PRESSURE IN SAID RANGE, CARRYING OUT SAID REACTION AT A TEMPERATURE IN THE RANGE FROM 280* TO 340*F. FOR A PERIOD OF FROM 2 TO 16 HOURS UNDER CONDITIONS WHEREIN THE CONCENTRATION OF THE VINYL ACETATE IN THE BENZENE SOLUTION VARIES FROM ABOUT 0.2 TO 10.0%, WHEREBY A POLYMER HAVING A MOLECULAR WEIGHT IN THE RANGE FROM ABOUT 1000 TO 3000 IS SECURED, WHEREIN THE CONCENTRATION OF THE VINYL ACETATE IN THE PRODUCT WILL VARY FROM ABOUT 15 TO 28% BY WEIGHT.
References Cited (Backward Citations)
US2396785A
Cited
US3093623A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-12-01 | 1968-06-01 | 1968-12-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-12-01 | 1972-06-01 | 1972-12-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-12-01 | 1976-06-01 | 1976-12-01 | $7700.00 | Window Closed / Lapsed |