Patents by Inventor Dong-Fen Qu

Dong-Fen Qu 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).

  • Tobacco composition with bluish dogbane and a process for the preparation thereof
    Patent number: 4600026
    Abstract: The present invention relates to a tobacco composition comprising tobacco and bluish dogbane in the form of bluish dogbane leaves or bluish dogbane extract, a process for making the tobacco composition and a process for producing bluish dogbane extract. The tobacco composition of the present invention is useful to alleviate and cure chronic bronchitis caused by smoking.
    Type: Grant
    Filed: March 14, 1985
    Date of Patent: July 15, 1986
    Inventor: Dong-Fen Qu