Patents by Inventor Hiroki Kamiyama

Hiroki Kamiyama 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).

  • BRAIDED STRUCTURE, TUBE STRUCTURE, TUBE STRUCTURE FOR CATHETER, METHOD FOR MANUFACTURING BRAIDED STRUCTURE
    Publication number: 20240390640
    Abstract: A catheter includes a shaft, a first wire wound in a spiral shape around an axis of the shaft, and a second wire wound around the shaft in a direction opposite to that of the first wire in a first portion, and wound around the shaft in a direction identical to that of the first wire in a second portion. Accordingly, it is possible to provide a braided structure and the like having flexibility that differs depending on the area in an axial direction.
    Type: Application
    Filed: July 30, 2024
    Publication date: November 28, 2024
    Inventors: Takuya SASAKI, Hiroki KAMIYAMA
  • ELECTRODE CATHETER AND METHOD OF MANUFACTURING CATHETER SHAFT
    Publication number: 20240108403
    Abstract: An electrode catheter includes a catheter shaft including a shaft main body enclosing a first lumen and a second lumen separated from each other, and a reinforcement layer embedded into the shaft main body, an electrode having a ring shape and mounted to an outer peripheral portion of the shaft main body, and a lead wire electrically conductive to the electrode and inserted into the first lumen. The reinforcement layer has conductivity and, inside the electrode, surrounds the second lumen without surrounding the first lumen.
    Type: Application
    Filed: September 29, 2023
    Publication date: April 4, 2024
    Inventors: Tomoharu KOISO, Hiroki KAMIYAMA, Shingo HAYASHIDA
  • Process for converting glycol dialkyl ether
    Patent number: 4368337
    Abstract: A process is described for converting glycol dialkyl ether without substantial formation of olefin oligomers by reaction with water, comprising reacting a feed glycol di-tertiary alkyl ether represented by structural formula (A) with water using a strongly acidic cation-exchange resin as a catalyst and a reaction temperature of from 40.degree. C. to 150.degree. C. under a pressure of from 1 to 70 kg/cm.sup.2 (absolute pressure) in a molar ratio of water/feed glycol di-tertiary alkyl ether represented by the structural formula (A) of from 0.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: January 11, 1983
    Assignee: Maruzen Oil Co., Ltd.
    Inventors: Kinya Tawara, Hiroki Kamiyama, Shigenori Nakashizu, Takashi Kaneko, Tadahiro Wakui, Tadashi Matsumoto
  • Process for producing granular sulfurized material, granular carbon or granular activated carbon
    Patent number: 4024076
    Abstract: A process for producing an infusible and insoluble granular sulfurized material by reacting a petroleum heavy material and sulfur with stirring in the presence of a reaction medium and further in the presence of, if necessary, an infusible and insoluble solid material, and, further, a process for producing granular carbon comprising carbonizing the granular sulfurized material produced above or alternatively a process for producing granular activated carbon comprising carbonizing and activating the granular sulfurized material.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: May 17, 1977
    Assignee: Maruzen Oil Co. Ltd.
    Inventors: Hiroshi Miyake, Makoto Iriuchijima, Eiji Takahashi, Kiyoshi Terata, Hiroki Kamiyama, Masami Kurihara, Etsuo Suzuki, Tsutomu Idai