Increasing the particle size of formed polyethylene or ethylene copolymer
CA 1084033 A · Owner: Standard Oil Company · Inventors: Hoff, Glen R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The particle size of as formed polyethylene or ethylene copolymer containing up to about twenty percent of a C3 to C8 olefin can be increased by using a high yield, solid catalyst component prepared from (1) a magnesium alkoxide, (2) a titanium (IV) or vanadium (V) chloride chloroalkoxide or alkoxide, (3) an alkylaluminum compound and (4), hydrogen chloride. The particle size of as formed polymer can be increased substantially using the hydrogen-chloride-prepared catalyst component compared to the particle size of polymer made using a similar catalyst component prepared without the use of hydrogen chloride when either is, employed with an alkylaluminum compound promoter in a slurry or vapor …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 19, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 19, 1997.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.