Patents by Inventor Masami Takuno

Masami Takuno 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).

  • Highly hygroscopic laminate
    Patent number: 5143773
    Abstract: A hygroscopic laminate comprises a hygroscopic layer comprising a gas permeable film, and a water-absorbing polymer and at least one humectant selected from the group consisting of acetic acid, propionic acid, glycolic acid, lactic acid, hydracrylic acid, pyruvic acid and pyrrolidonecarboxylic acid and sodium, potassium, calcium and magnesium salts of these acids, which are wrapped in the gas permeable film; a porous non-water retention sheet; and a water impermeable sheet, the porous non-water retention sheet being disposed on one side of the hygroscopic layer and the water impermeable sheet being disposed on the other side of the hygroscopic layer, to thereby sandwich the hygroscopic layer. The hygroscopic laminate controls the relative humidity in a packaged system to 20 to 40%.
    Type: Grant
    Filed: March 28, 1991
    Date of Patent: September 1, 1992
    Assignee: Showa Denko Kabushiki Kaisha
    Inventor: Masami Takuno
  • Water absorption controlled dehydrating device
    Patent number: 4819342
    Abstract: A water absorption controlled dehydrating device which comprises covering a high osmotic pressure substance and a water soluble thickening agent with a supporting material provided at least partly with a water-permeable semipermeable membrane.
    Type: Grant
    Filed: December 30, 1987
    Date of Patent: April 11, 1989
    Assignee: Showa Denko Kabushiki Kaisha
    Inventors: Mamoru Matsubara, Masami Takuno