Patents by Inventor Yasushi Tomura

Yasushi Tomura 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 polyethylene
    Patent number: 4271280
    Abstract: An improved process for the high pressure polymerization of ethylene using a battery of two reactors in which the preceding autoclave reactor having two reaction zones is connected in series with the succeeding autoclave reactor having one reaction zone through a heat exchanger. This process has a high efficiency of polymerization initiator and gives a polyethylene excellent in optical properties and processability in a high reaction yield.
    Type: Grant
    Filed: December 17, 1979
    Date of Patent: June 2, 1981
    Assignee: Sumitomo Chemical Company, Limited
    Inventors: Yasushi Tomura, Fujio Sakuma, Seiji Suzuki, Masayuki Shimizu