Patents by Inventor Okada Takayuki

Okada Takayuki 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 manufacturing homopolymers and copolymers of ethylene
    Patent number: 4551509
    Abstract: A process for producing ethylene polymers or ethylene copolymers comprising the steps of: (a) continuously polymerizing ethylene or ethylene and an .alpha.-olefin in a reaction mixture at a pressure of at least 300 kg/cm.sup.2 and a temperature of at least 130.degree. C. in the presence of a catalyst composed of a compound of a transition metal of groups IVa and VIa of the Periodic Table and an organometallic compound of a metal of groups I to III of the Periodic Table; and (b) adding a polyalkylene glycol to the reaction mixture to deactivate the catalyst.
    Type: Grant
    Filed: July 29, 1983
    Date of Patent: November 5, 1985
    Assignee: Societe Chimique des Charbonnages S.A.
    Inventors: Okada Takayuki, Tanaka Hisao, Sawara Ken-Ichi, Konaka Tsutomu