Patents by Inventor Michio Koga

Michio Koga 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 modified polypropylene
    Patent number: 3974236
    Abstract: Heteroblock copolymers of propylene and ethylene containing a relatively small quantity of an isotactic polypropylene segment, a copolymer segment of very low ethylene (polymerized) content, and another copolymer segment of high ethylene (polymerized) content, in which the quantities of the three types of segments are specific, and in which the isotactic polypropylene content is specific, which heteroblock copolymers are produced by three types of successive steps of polymerization with the monomer feeds in specific ratios of ethylene/propylene, the ratio being zero for the first step.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: August 10, 1976
    Assignee: Mitsubishi Petrochemical Company Limited
    Inventors: Michio Koga, Hideo Sato