Patents by Inventor Eiji Sogabe

Eiji Sogabe has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for producing solid catalyst for use in polymerization of olefins
    Patent number: 4983561
    Abstract: A process for producing a trivalent titanium compound-containing solid catalyst for use in the polymerization of olefins which comprises treating, with an ester compound, a solid product obtained by reducing a titanium compound represented by the following general formula: ##STR1## (R.sup.1 represents hydrocarbon group having 1 to 20 carbon atoms, X represents halogen atom, and n represents a number satisfying 0<n.ltoreq.4) with an organomagnesium compound in the presence of an organic silicon compound having Si--O bond, and thereafter treating it with a mixture of an ester compound and titanium tetrachloride.
    Type: Grant
    Filed: September 12, 1989
    Date of Patent: January 8, 1991
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Toshio Sasaki, Eiji Sogabe, Takeshi Ebara