Patents by Inventor Hirokatsu Bannai

Hirokatsu Bannai 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).

  • Aluminum or aluminum alloy material having surface treatment coating film, and method for treating a surface thereof
    Patent number: 8741445
    Abstract: Provided is an aluminum or aluminum alloy material having a surface treatment coating film on a surface of a substrate formed by an aluminum or aluminum alloy. The aluminum or aluminum alloy material has: a substrate formed by an aluminum or aluminum alloy; and a first protective layer and a second protective layer in the order on a surface of the substrate, wherein the first protective layer is a conversion coating film including vanadium and at least one or more types of metals selected from titanium, zirconium, and hafnium, the second protective layer is an organic coating film having a composition that includes (1) a chitosan derivative and a solubilizing agent, (2) a modified polyvinyl alcohol formed by graft polymerization of a hydrophilic polymer to a side chain of polyvinyl alcohol, and (3) a water-soluble crosslinking agent.
    Type: Grant
    Filed: February 8, 2011
    Date of Patent: June 3, 2014
    Assignees: Nihon Parkerizing Co., Ltd., Denso Corporation
    Inventors: Hirokatsu Bannai, Yoshiyuki Okamoto, Kenji Nakamura, Takayuki Hirose, Osamu Kasebe, Shin Nishiya, Kengo Kobayashi
  • ALUMINUM OR ALUMINUM ALLOY MATERIAL HAVING SURFACE TREATMENT COATING FILM, AND METHOD FOR TREATING A SURFACE THEREOF
    Publication number: 20130034743
    Abstract: Provided is an aluminum or aluminum alloy material having a surface treatment coating film on a surface of a substrate formed by an aluminum or aluminum alloy. The aluminum or aluminum alloy material has: a substrate formed by an aluminum or aluminum alloy; and a first protective layer and a second protective layer in the order on a surface of the substrate, wherein the first protective layer is a conversion coating film including vanadium and at least one or more types of metals selected from titanium, zirconium, and hafnium, the second protective layer is an organic coating film having a composition that includes (1) a chitosan derivative and a solubilizing agent, (2) a modified polyvinyl alcohol formed by graft polymerization of a hydrophilic polymer to a side chain of polyvinyl alcohol, and (3) a water-soluble crosslinking agent.
    Type: Application
    Filed: February 8, 2011
    Publication date: February 7, 2013
    Applicants: DENSO CORPORATION, NIHON PARKERIZING CO., LTD.
    Inventors: Hirokatsu Bannai, Yoshiyuki Okamoto, Kenji Nakamura, Takayuki Hirose, Osamu Kasebe, Shin Nishiya, Kengo Kobayashi
  • Process for forming a phosphate conversion coating on metal
    Patent number: 6723178
    Abstract: A metal surface on which a phosphate conversion coating is to be formed and which has been surface conditioned by contact with a liquid surface conditioner composition that contains dispersed fine particles of solid phosphate of at least one divalent or trivalent cations type and an adhesion promoting agent. After such conditioning, a very high quality conversion coating can be formed on the surface by contact with a nickel-free liquid phosphating composition that contains at least acid, zinc cations, and phosphate anions and optionally and preferably also contains other materials.
    Type: Grant
    Filed: January 19, 2002
    Date of Patent: April 20, 2004
    Assignee: Henkel Corporation
    Inventors: Hirokatsu Bannai, Yasuhiko Nagashima, Takaomi Nakayama