Patents by Inventor Keiji Kasumi

Keiji Kasumi 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).

  • Concrete Pumping Pipe
    Publication number: 20240117646
    Abstract: A concrete pumping pipe comprising no metal pipe, and having a cylindrical body composed of a resin, wherein a dynamic friction coefficient of the inner surface of the cylindrical body is 0.07 to 0.30, the cylindrical body is free of rupture and leakage in a 25 MPa hydraulic pressure resistance test, and a total luminous transmittance per 2 mm-thickness test piece of the cylindrical body is 10% or more.
    Type: Application
    Filed: April 12, 2021
    Publication date: April 11, 2024
    Applicant: Asahi Kasei Advance Corporation
    Inventors: Koichiro Sato, Keiji Kasumi