Patents by Inventor Yasukazu Himeda

Yasukazu Himeda 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).

  • Separate type medical material
    Patent number: 7807657
    Abstract: A separate type medical material containing a hyaluronic acid ester derivative, which satisfies the storage stability of a hyaluronic acid ester derivative and avoidance of irritation and pain at the time of injecting a therapeutic agent for joints, is provided. A separate type medical material comprising liquid (A) which is an aqueous solution containing a hyaluronic acid ester derivative and buffered to a pH of from 4.5 to 6.5, and liquid (B) which is an aqueous solution having such a buffering power that when it is mixed with the liquid (A), the mixed liquid has a pH within a range of from 6.8 to 7.8, kept separately from each other.
    Type: Grant
    Filed: February 7, 2008
    Date of Patent: October 5, 2010
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Miyata, Yasukazu Himeda, Masamichi Hashimoto, Toshihiko Umeda, Teruzou Miyoshi
  • Use of soluble cellulose derivative having been made hardly soluble in water and process for producing the same
    Patent number: 7514097
    Abstract: (1) A tissue-covering medical material which comprises a soluble cellulose derivative having been made hardly soluble in water, which is used with a purpose of being embedded in the body or applied to the tissue, and (2) a method for producing the tissue-covering medical material as defined in (1), which comprises, as a method to make a soluble cellulose derivative hardly soluble in water, freezing and thawing an acidic solution of the soluble cellulose derivative, are provided.
    Type: Grant
    Filed: August 18, 2000
    Date of Patent: April 7, 2009
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yasukazu Himeda, Toshihiko Umeda
  • SEPARATE TYPE MEDICAL MATERIAL
    Publication number: 20080132585
    Abstract: A separate type medical material containing a hyaluronic acid ester derivative, which satisfies the storage stability of a hyaluronic acid ester derivative and avoidance of irritation and pain at the time of injecting a therapeutic agent for joints, is provided. A separate type medical material comprising liquid (A) which is an aqueous solution containing a hyaluronic acid ester derivative and buffered to a pH of from 4.5 to 6.5, and liquid (B) which is an aqueous solution having such a buffering power that when it is mixed with the liquid (A), the mixed liquid has a pH within a range of from 6.8 to 7.8, kept separately from each other.
    Type: Application
    Filed: February 7, 2008
    Publication date: June 5, 2008
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Miyata, Yasukazu Himeda, Masamichi Hashimoto, Toshihiko Umeda, Teruzou Miyoshi
  • Separate type medical material
    Publication number: 20060135469
    Abstract: A separate type medical material containing a hyaluronic acid ester derivative, which satisfies the storage stability of a hyaluronic acid ester derivative and avoidance of irritation and pain at the time of injecting a therapeutic agent for joints, is provided. A separate type medical material comprising liquid (A) which is an aqueous solution containing a hyaluronic acid ester derivative and buffered to a pH of from 4.5 to 6.5, and liquid (B) which is an aqueous solution having such a buffering power that when it is mixed with the liquid (A), the mixed liquid has a pH within a range of from 6.8 to 7.8, kept separately from each other.
    Type: Application
    Filed: August 16, 2002
    Publication date: June 22, 2006
    Applicant: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Yoshiaki Miyata, Yasukazu Himeda, Masamichi Hashimoto, Toshihiko Umeda, Teruzou Miyoshi
  • Hyaluronic acid gel composition, process for producing the same, and medical material containing the same
    Patent number: 6638538
    Abstract: A hyaluronic acid gel composition comprising hyaluronic acid and a polymer, which is substantially unmodified with a chemical cross-linking agent or a chemical modifying agent and which has a percentage dissolution of hyaluronic acid of 50% or lower in 12 hours in a neutral aqueous solution of 37° C.
    Type: Grant
    Filed: September 27, 2001
    Date of Patent: October 28, 2003
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Masamichi Hashimoto, Toshihiko Umeda, Kazuhiko Arai, Yoshiaki Miyata, Osamu Yamamoto, Yasukazu Himeda