Patents by Inventor Masaharu Shikama

Masaharu Shikama 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).

  • Thermoplastic polyester resin composition which is quickly crystallizable
    Patent number: 4368286
    Abstract: A thermoplastic resin composition is quickly crystallizable and comprises 0.1 to 10 wt. parts of an alkali metal salt of higher fatty acid having carbon atoms of at least 26 obtained by an addition of a fatty acid to .alpha.-olefin having carbon atoms of at least 23 per 100 wt. parts of a thermoplastic polyester.
    Type: Grant
    Filed: March 18, 1981
    Date of Patent: January 11, 1983
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Masahiro Hayashi, Tamotsu Yoshimura, Seiichi Mukai, Masaharu Shikama, Hideto Kusumoto, Hideki Yamanouchi
  • Process for producing polyoxymethylene
    Patent number: 4246396
    Abstract: Polyoxymethylene having high molecular weight and high thermal stability is produced by polymerizing formaldehyde in the presence of a specific catalyst and then heating the resulting polyoxymethylene. The specific catalyst is produced by contacting a phosphorus containing compound or an amine (c) with a reaction product obtained by reacting salicylic acid component (b) with an organoaluminum compound (a) having the formula ##STR1## wherein R.sup.1 represents an alkyl or alkoxyl group and R.sup.2 and R.sup.3 respectively represent alkyl or alkoxyl group or a halogen atom.
    Type: Grant
    Filed: November 1, 1979
    Date of Patent: January 20, 1981
    Assignee: Mitsubishi Chemical Industries, Limited
    Inventors: Ikuo Sukegawa, Seiichi Nozawa, Seiichi Mukai, Masaharu Shikama
  • Process for producing polyoxymethylene
    Patent number: 4158729
    Abstract: Polyoxymethylene is produced by polymerizing formaldehyde in the presence of a catalyst comprising a catalytic component of an organoaluminum compound or a complex thereof supported on a modifier of a higher carboxylic acid amide compound.The organoaluminum compound can be in a form of a complex of the organoaluminum compound and a phosphorus compound or an amine.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: June 19, 1979
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Harutaka Kimura, Seiichi Nozawa, Seiichi Mukai, Masaharu Shikama