Patents by Inventor Yun-Huey Lee

Yun-Huey Lee 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).

  • Rhodosporidium D-amino acid oxidase
    Patent number: 5877013
    Abstract: This invention relates to a D-amino acid oxidase of the genus Rhodosporidium and a gene encoding it.
    Type: Grant
    Filed: July 31, 1997
    Date of Patent: March 2, 1999
    Assignee: Food Industry Research and Development Institute
    Inventors: Gwo-Jen Liao, Yi-Jang Lee, Yun-Huey Lee, Li-Lin Chen, Wen-Shen Chu
  • Screening and characterization of glutaryl-7-aminocephalosporanic acid acylase
    Patent number: 5766871
    Abstract: A method of screening for a given enzyme in colony-forming cells using a substrate of the enzyme that has low solubility. Use of such a method leads to the discovery of glutaryl-7-aminocephalosporanic acid (GL-7-ACA) acylase of Pseudomonas nitroreducens. Also disclosed is a method of obtaining GL-7-ACA acylase from Pseudomonas cells.
    Type: Grant
    Filed: November 27, 1996
    Date of Patent: June 16, 1998
    Assignee: Food Industry Research and Development Institute
    Inventors: Wen-Shen Chu, Yun-Huey Lee, Ming-Chu Chen, Li-Lin Chen, Chiou-Yen Wen
  • Bioconversion of cephalosporin C to glutaryl-7-aminocephalosporanic acid
    Patent number: 5597704
    Abstract: A method of converting cephalosporin C to glutaryl-7-aminocephalosporanic acid. The method including obtaining a cell preparation from a microorganism which produces D-amino acid oxidase, the preparation being a cell-free extract or a suspension of permeated cells; adding a D-.alpha.-amino acid to the preparation; after the adding step, heating the preparation at 50.degree.-75.degree. C. for 5-60 minutes; and incubating cephalosporin C in the preparation. Also disclosed are a method of converting cephalosporin C to glutaryl-7-aminocephalosporanic acid in the absence of exogenous H.sub.2 O.sub.2, and a method of screening for a D-amino acid oxidase-producing microorganism.
    Type: Grant
    Filed: May 1, 1995
    Date of Patent: January 28, 1997
    Assignee: Food Industry Research and Development Institute
    Inventors: Yun-Huey Lee, Wen-Shen Chu, Wen-Hwei Hsu