US2977350A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polymerization of olefins
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1956-06-14
•
Granted: 1961-03-28
•
Expires: 1976-06-14
Abstract
No abstract record available.
Inventors
- 👤 Fasce Egi Victor
- 👤 Mertzweiller Joseph Kern
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:22
CPC Classifications
C; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/903
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A SLURRY PROCESS OF POLYMERIZING ETHYLENE AT POLYMERIZATION CONDITIONS IN AN INERT ORGANIC LIQUID DILUENT WITH A CATALYST SYSTEM OF TITANIUM TETRACHLORIDE AND AN ALKYL ALUMINUM REDUCING COMPOUND THE IMPROVED METHOD OF REDUCING FILM FORMATION AND IMPROVING THE STIRRABILITY OF THE RESULTING SLURRY REACTION MIXTURE WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF 0.01 TO 3 WT. PERCENT, BASED ON THE WEIGHT OF LIQUID DILUENT, OF AN ALPHA STRAIGHT CHAIN MONOOLEFIN HAVING FROM 6 TO 14 CARBON ATOMS, THE DILUENT BEING PRESENT IN AN AMOUNT TO GIVE A REACTION MIXTURE CONTAINING FROM 10 TO 40% POLYMER.
Claim 2
Dependent Claim
99 words
IN A SLURRY PROCESS OF POLYMERIZING ETHYLENE AT POLYMERIZATION CONDITIONS IN AN INERT ORGANIC LIQUID DILUENT WITH A CATALYST SYSTEM OF TITANIUM TETRACHLORIDE AND AN ALKYL ALUMINUM REDUCING COMPOUND THE IMPROVED METHOD OF REDUCING FILM FORMATION AND IMPROVING THE STIRRABILITY OF THE RESULTING SLURRY REACTION MIXTURE WHICH COMPRISES CARRYING OUT THE POLYMERIZATION IN THE PRESENCE OF 0.01 TO 3 WT. PERCENT, BASED ON THE WEIGHT OF LIQUID DILUENT, OF AN ALPHA STRAIGHT CHAIN MONOOLEFIN HAVING FROM 6 TO 14 CARBON ATOMS, THE DILUENT BEING PRESENT IN AN AMOUNT TO GIVE A REACTION MIXTURE CONTAINING FROM 10 TO 40% POLYMER.
References Cited (Backward Citations)
US2474671A
Cited
BE533362A
Cited
BE538782A
Cited
US2717888A
Cited
US2905645A
Cited
US2879263A
Cited
US2824089A
Cited
US2839518A
Cited
US2850488A
Cited
US2833755A
Cited
US2827447A
Cited
US2886561A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-03-27 | 1964-09-26 | 1965-03-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-03-27 | 1968-09-26 | 1969-03-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-03-27 | 1972-09-26 | 1973-03-28 | $7700.00 | Window Closed / Lapsed |