Patents by Inventor Dong J. Choo

Dong J. Choo 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).

  • Hydrophilic oxygen permeable polymers
    Patent number: 5534605
    Abstract: Polymeric materials comprising novel wetting agents such as 2-isopropenyl-4,4-dimethyl-2-oxazolin-5-one, 2-vinyl-4,4-dimethyl-2-oxazolin-5-one, and the like.
    Type: Grant
    Filed: July 20, 1994
    Date of Patent: July 9, 1996
    Assignee: Bausch & Lomb Incorporated
    Inventors: Ronald E. Bambury, Dong J. Choo
  • Hydrophilic oxygen permeable polymers
    Patent number: 5357013
    Abstract: Polymeric materials comprising novel wetting agents such as 2-isopropenyl-4,4-dimethyl-2-oxazolin-5-one, 2-vinyl-4,4-dimethyl-2-oxazolin-5-one, and the like.
    Type: Grant
    Filed: September 17, 1992
    Date of Patent: October 18, 1994
    Assignee: Bausch & Lomb Incorporated
    Inventors: Ronald E. Bambury, Dong J. Choo
  • Hydrophilic oxygen permeable polymers
    Patent number: 4910277
    Abstract: Polymeric materials comprising novel wetting agents such as 2-isopropenyl-4,4-dimethyl-2-oxazolin-5-one, 2-vinyl-4,4-dimethyl-2-oxazolin-5-one, and the like.
    Type: Grant
    Filed: February 9, 1988
    Date of Patent: March 20, 1990
    Inventors: Ronald E. Bambury, Dong J. Choo
  • Ultraviolet blocking agents for contact lenses
    Patent number: 4719248
    Abstract: Novel ultraviolet absorbing compounds useful in contact lenses and methods for curing contact lenses containing UV absorbers are disclosed.
    Type: Grant
    Filed: August 8, 1985
    Date of Patent: January 12, 1988
    Assignee: Bausch & Lomb Incorporated
    Inventors: Ronald E. Bambury, Joon S. Park, Dong J. Choo