Patents by Inventor Shen Kung Liao

Shen Kung Liao 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).

  • Dry-cleaning solvent composition
    Patent number: 6491729
    Abstract: A dry-cleaning solvent composition for dry-cleaning is disclosed, comprising a compound or solvent selected from the group consisting of propylene glycol methyl ether formate, propylene glycol methyl ether acetate, propylene glycol methyl ether propionate, propylene glycol methyl ether butyrate, propylene glycol ethyl ether formate, propylene glycol ethyl ether acetate, propylene glycol ethyl ether propionate, propylene glycol ethyl ether butyrate, ethylene glycol methyl ether formate, ethylene glycol methyl ether acetate, ethylene glycol methyl ether propionate. ethylene glycol methyl ether butyrate, and the mixture thereof. The dry-cleaning solvent composition may further comprise a compound or solvent selected from the group consisting of perchloroethylene, stoddard solvent type I, stoddard solvent type II, and the mixture thereof, in an amount of below 70 wt %.
    Type: Grant
    Filed: January 28, 2000
    Date of Patent: December 10, 2002
    Inventors: Chin Yen Lee, Shen Kung Liao