Patents by Inventor Hiroyasu Miyasaka

Hiroyasu Miyasaka 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).

  • Patent number: 5128412
    Abstract: A removable adhesive composition comprising (i) 100 parts by weight of a copolymer (A) which is tacky at ordinary temperature, synthesized of 90 to 99.9% by weight of a nonfunctional vinyl type monomer (a) mainly composed of an acrylate or methacrylate ester having an alkyl group having 2 to 12 carbon atoms and 0.1 to 10% by weight of a functional vinyl type monomer (b) having one or more of a carboxyl group, a hydroxyl group, an amino group or an epoxy group in its molecule; (ii) 20 to 1,000 parts by weight of a copolymer (B) whose glass transition point is 10.degree. C. or less and also having a mean particle diameter of 0.5 to 300 .mu.m, synthesized of 90 to 99.9% by weight of a nonfunctional vinyl type monomer (a) mainly composed of acrylate or methacrylate ester having an alkyl group having 2 to 12 carbon atoms and 0.1 to 10% by weight of an .alpha.-monoolefinic carboxylic acid (c); and (iii) 0.
    Type: Grant
    Filed: May 14, 1990
    Date of Patent: July 7, 1992
    Assignee: Nichiban Company Limited
    Inventors: Hiroyasu Miyasaka, Yasuaki Kitazaki, Tetsuaki Matsuda, Junichi Kobayashi
  • Patent number: 4822670
    Abstract: Disclosed is a removable adhesive sheet or tape which comprises adhesive fine particles attached on at least one side of a substrate through a primer resin layer comprising at least one selected from the group consisting of a poly (vinylidene chloride) resin, a poly (vinyl acetate) resin having a polymerization degree of 400 or more, a polyamide resin having a melting point of 80.degree. C. or less, a poly (vinyl chloride-vinyl acetate) type resin, a phenol-modified epoxy resin and a maleated natural rubber.According to the present invention, a removable adhesive sheet or tape which is excellent in removability even after frequent repetition of bonding to and removal from an adherend can be obtained.
    Type: Grant
    Filed: September 8, 1986
    Date of Patent: April 18, 1989
    Assignee: Nichiban Company Limited
    Inventors: Kiyoshi Ono, Yasuo Sakurai, Yoshio Kishimoto, Hiroyasu Miyasaka, Yasuaki Kitazaki, Tetsuaki Matsuda, Junichi Kobayashi
  • Patent number: 4814227
    Abstract: To prevent the growth of aquatic animals and plants on the surfaces of underwater structures, the surfaces are covered with a protective adhesive sheet comprised of a copper-nickel alloy plate having a weight ratio of copper:nickel in the range of 100:0 to 80:20, a primer layer formed on the alloy plate, and a pressure-sensitive adhesive layer formed on the primer layer. Prior to applied the adhesive sheet, the surface to be protected is preferably cleaned and coated with a primer of the same composition as that of the primer layer of the adhesive sheet.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: March 21, 1989
    Assignee: Nichiban Company Limited
    Inventors: Kunio Maeda, Hiroyasu Miyasaka, Yasuaki Kitazaki, Takafumi Yamada, Terumi Nakata, Hiroo Sato
  • Patent number: 4735837
    Abstract: A removable adhesive sheet comprising a substrate (A) and an adhesive composition layer which comprises elastic micro-balls (B) and an adhesive (C), the adhesive composition layer being formed on an adhesive layer forming surface of the substrate, wherein the mixing proportion of the elastic micro-balls (B) to the adhesive (C) in the adhesive composition layer is 1:10 to 10:1 in terms of weight ratio, and the protrusive areas of the elastic micro-balls (B) partially protruding from the surface of the adhesive composition layer is entirely covered with the adhesive (C) has an adhesion capability that is not lowered through a frequent repetition of bonding to and removing from an adherend.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: April 5, 1988
    Assignee: Nichiban Company Limited
    Inventors: Hiroyasu Miyasaka, Yasuaki Kitazaki, Tetsuaki Matsuda, Junichi Kobayashi