Patent Yard Sign in
Expired Canadian patentCanada

Process for producing olefin polymers

CA 1137966 A · Owner: Sumitomo Chemical Co. Ltd. · Inventors: Okawa, Masahisa; Matsu-Ura, Hideaki; Sasaki, Toshio

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

A process for producing an olefin polymer by polymerizing an olefin with a catalyst system comprising an organoaluminum compound and a supported catalyst component prepared by using as the carrier a solid product obtained by the reaction of an organomagnesium compound with an aluminum halide compound and/or a silicon halide compound, by heating a liquid ether complex of titanium trichloride in the presence of said carrier, and further reacting the resulting titanium trichloride-containing solid product with titanium tetrachloride. By this process the olefin, polymer having a broad molecular weight distribution suitable for flow molding or extrusion molding is produced.

Read the whole patent

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 December 21, 1982. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 21, 1999.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 29, 1980
GrantedDecember 21, 1982
Term endedDecember 21, 1999
Patent numberCA 1137966 A
Classification (IPC)C08F4/64 +1 more

Timeline

Timeline From CIPO dates

1981198319851987198919911993199519971999Application filedJan 29, 1980Patent grantedDec 21, 1982Term endedDec 21, 1999

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.