Ethylene polymerization catalyst
CA 1306239 C · Owner: Union Carbide Corporaiton · Inventors: Karol, Frederick John; Zoeckler, Mary Therese
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An ethylene polymerization catalyst comprising:, (i) a complex having at least one cation and at least one anion wherein the cation is V2X3(ED)m and the anion is, MClbRc wherein X = Cl, Br, or I, or mixtures thereof, ED - an electron donor selected from the group consisting of ethers, phosphines ketones, isocyanides, and esters, each electron donor having 2 to 20 carbon atoms M = Al or Mg, R = an alkyl radical having 1 to 14 carbon atoms, m = an integer from 3 to 6 b = 2 when M = Al and 3 when M = Mg, c = 2 when M = Al and 0 when M = Mg said complex impregnated on an, inorganic oxide support; (ii) a halocarbon promoter; and, (iii) a hydrocarbyl aluminum cocatalyst. D-15406
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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 11, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 2009.
- 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.