Patents by Inventor Tetsuro Shirakawa

Tetsuro Shirakawa 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).

  • Fiber-reinforced cement molded product, and process for its production
    Patent number: 6605148
    Abstract: A molded product which has a high strength and which is excellent in surface smoothness and freezing damage resistance. It comprises a fiber-reinforced cement molded OK product which has a bulk specific gravity of from 0.9 to 1.2, and which comprises, by mass, from 2 to 15% of hollow particles, from 1 to 40% of an inorganic admixture having pores which are open to the surface, from 5 to 70% in total of cement and/or lime, from 0 to 50% of slag, from 0 to 50% of gypsum, from 20 to 60% of a quartzite powder, from 0 to 20% of micro silica, from 0 to 30% of an inorganic aggregate other than the above components and from 2 to 30% of cellulose fibers.
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: August 12, 2003
    Assignee: Asahi Glass Company, LImited
    Inventors: Tetsuro Shirakawa, Seiji Inoue
  • Fiber-reinforced cement molded product, and process for its production
    Publication number: 20020060282
    Abstract: It is to obtain a molded product which has a high strength and which is excellent in surface smoothness and freezing damage resistance.
    Type: Application
    Filed: August 10, 2001
    Publication date: May 23, 2002
    Applicant: Asahi Glass Company, Limited
    Inventors: Tetsuro Shirakawa, Seiji Inoue