US3093623A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of improved pour depressants for middle distillates
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1960-01-05
•
Granted: 1963-06-11
•
Expires: 1980-01-05
Abstract
No abstract record available.
Inventors
- 👤 Ilnyckyj Stephan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:03
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/146; C08; C08F; C08F10/00; C10L1/18; C10L1/192; C10L1/195; C10L1/1955; C10L1/196; C10L1/1963; C10L1/197; C10L1/1973; C10L1/22; C10L1/234; C10L1/236; C10L1/2362
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
159 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 BENZENE SOLVENT, 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 700 TO 2000 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 FROM A PERIOD OF AT A TEMPERATURE IN THE RANGE FROM 280* TO 340* F. FOR 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
159 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 BENZENE SOLVENT, 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 700 TO 2000 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 FROM A PERIOD OF AT A TEMPERATURE IN THE RANGE FROM 280* TO 340* F. FOR 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)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-06-10 | 1966-12-10 | 1967-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-06-10 | 1970-12-10 | 1971-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-06-10 | 1974-12-10 | 1975-06-11 | $7700.00 | Window Closed / Lapsed |