US3148176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Purification of polymerized alphaolefins
Assignee: Standard Oil Co
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Filing: 1961-03-15
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Granted: 1964-09-08
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Expires: 1981-03-15
Abstract
No abstract record available.
Inventors
- 👤 Omar O Javeland
- 👤 Wayne E Smith
- 👤 Edwin F Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:50
CPC Classifications
C; C08; C08F; C08F6/00; C08F6/02
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
138 words
A METHOD OF REMOVING ASH-FORMING ALUMINUM COMPOUNDS FROM A HYDROCARBON POLYMER, WHICH METHOD COMPRISES TREATING A HYDROCARBON POLYMER REACTION MIXTURE CONTAINING A DISSOLVED ALUMINUM HYDROCARBON COMPOUND TO EFFECT COMPLETE SOLUTION OF SAID POLYMER THEREIN, SAID MIXTURE RESULTING FROM POLYMERIZING AT LEAST ONE ALPHAOLEFIN MONOMER IN AN INERT HYDROCARBON SOLVENT IN THE PRESENCE OF A CATALYST COMPRISING A COMPOUND OF A METAL OF GROUPS 4A TO 6A TO THE PERIODIC TABLE AND AN ALUMINUM HYDROCARBON COMPOUND, INTIMATELY CONTACTING SAID MIXTURE WITH A REAGENT CONSISTING ESSENTIALLY OF A CELLULOSIC MATERIAL SUBSTANTAILLY FREE OF MOISTURE FOR A PERIOD OF TIME SUFFICIENT TO INSOLUBILIZE SAID ALUMINUM HYDROCARBON COMPOUND, THEREAFTER SEPARATING SOLIDS FROM SAID MIXTURE WHILE MAINTAINING SAID POLYMER IN SOLUTION IN SAID SOLVENT, AND RECOVERING THEREFROM A SOLID POLYMER CHARACTERIZED BY A LOW CONTENT OF ASH RESULTING FROM SAID ALUMINUM HYDROCARBON COMPOUND.
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) | 1967-09-08 | 1968-03-09 | 1968-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-08 | 1972-03-09 | 1972-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-08 | 1976-03-09 | 1976-09-08 | $7700.00 | Window Closed / Lapsed |