Patents by Inventor Hyoung-Ryun Park

Hyoung-Ryun Park 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).

  • Unsaturated alkyl esters of 5-aminolevulinic acid, their preparation and their use
    Patent number: 8198325
    Abstract: Disclosed are unsaturated alkyl esters of 5-aminovulinic acid of the following chemical formula 1, or pharmaceutically acceptable salts thereof, a method for preparing the same, and uses thereof. [Chemical Formula I] NH2—CH2—CO—CH2—CH2—CO—O—R wherein, R is a group selected from a group consisting of 2-propenyl, 3-butenyl, 4-pentenyl, 5-hexenyl, cis-2-pentenyl, cis-3-hexenyl, cis-4-hexenyl, and trans-2-hexenyl. Also, a pharmaceutical composition comprising the unsaturated alkyl ester of 5-aminovulinic acid or a salt thereof as an active ingredient is provided. This pharmaceutical composition is easily absorbed transdermally and is of low cytotoxicity. Featuring no amino-protecting processes, the method guarantees high production yields.
    Type: Grant
    Filed: June 28, 2007
    Date of Patent: June 12, 2012
    Assignee: Industry Foundation of Chonnam National University
    Inventors: Jonghoon Oh, Jee-Bum Lee, Hyoung-Ryun Park
  • Unsaturated Alkyl Esters of 5-Aminolevulinic Acid, their Preparation and their Use
    Publication number: 20090176881
    Abstract: Disclosed are unsaturated alkyl esters of 5-aminovulinic acid of the following chemical formula 1, or pharmaceutically acceptable salts thereof, a method for preparing the same, and uses thereof. [Chemical Formula I] NH2—CH2—CO—CH2—CH2—CO—O—R wherein, R is a group selected from a group consisting of 2-propenyl, 3-butenyl, 4-pentenyl, 5-hexenyl, cis-2-pentenyl, cis-3-hexenyl, cis-4-hexenyl, and trans-2-hexenyl. Also, a pharmaceutical composition comprising the unsaturated alkyl ester of 5-aminovulinic acid or a salt thereof as an active ingredient is provided. This pharmaceutical composition is easily absorbed transdermally and is of low cytotoxicity. Featuring no amino-protecting processes, the method guarantees high production yields.
    Type: Application
    Filed: June 28, 2007
    Publication date: July 9, 2009
    Inventors: Jonghoon Oh, Jee-Bum Lee, Hyoung-Ryun Park