Patents by Inventor Hiroyasu Mizutani

Hiroyasu Mizutani 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 the production of air-permeable films
    Patent number: 4704238
    Abstract: A process for producing an air-permeable film is described, comprising stretching in at least one direction a film made of a composition comprising 42 to 87 vol % of a polyolefin resin and 58 to 13 vol % of an inorganic filler and further containing an aliphatic alcohol/fatty acid ester of a fatty acid having 10 to 22 carbon atoms and an aliphatic alcohol having 1 to 12 carbon atoms in an amount of 3 to 25 parts by weight per 100 parts by weight of the above composition.
    Type: Grant
    Filed: November 15, 1985
    Date of Patent: November 3, 1987
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Katsumi Okuyama, Hiroyasu Mizutani
  • Process for preparing an air-permeable film
    Patent number: 4585604
    Abstract: A process for producing an air-permeable film, which comprises:(a) biaxially stretching a tubular unstretched film of a composition comprising 42 to 87 vol % of a thermoplastic resin and 58 to 13 vol % of an inorganic filler along a truncated-conical mandrel;(b) blowing a gas over the outside of the biaxially stretched tubular film to cool said film; and(c) simultaneously blowing a gas continuously into the tube of the film so as to penetrate the gas through the film and go outside.
    Type: Grant
    Filed: June 15, 1984
    Date of Patent: April 29, 1986
    Assignee: Mitsubishi Petrochemical Co., Ltd.
    Inventors: Katsumi Okuyama, Hiroyasu Mizutani