Patents by Inventor Hiroyasu TAMAI

Hiroyasu TAMAI 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).

  • Publication number: 20220042175
    Abstract: [Problem] To propose a stainless steel structure excellent in hydrogen embrittlement resistance and corrosion resistance, being high in mass productivity, simple in device structure, low in equipment cost, and having a high cost advantage, and a method for manufacturing the same. [Solving means] It is stainless steel having hydrogen embrittlement resistance and corrosion resistance, a surface of electrolytically polished stainless steel being coated with a film obtained by passivating a metal oxide formed by a wet process, wherein the film thickness of the film obtained by passivating the metal oxide formed by a wet process is greater than 100 nm. A hydrogen permeability ratio (film-formed product/film-unformed product) is equal to or less than 2.0×10?2, and a relative reduction of area (under a hydrogen atmosphere of 110 MPa/under a nitrogen atmosphere of 10 MPa) in an SSRT test is equal to or greater than 0.8.
    Type: Application
    Filed: August 4, 2021
    Publication date: February 10, 2022
    Applicants: Asahimekki Corporation, The University of Electro-Communications, National Institute of Advanced Industrial Science and Technology, Tottori Institute of Industrial Technology
    Inventors: Kazuyoshi KAWAMI, Atsushi KINOSHITA, Takashi YAMANAKA, Yoji FUKUDA, Motonori TAMURA, Takashi IIJIMA, Hirotoshi ENOKI, Hiroyasu TAMAI, Mutsuharu IMAOKA, Takeshi FUKUTANI, Toshiyuki TANAKA, Yoshiaki SUZUKI