Patents by Inventor Andrei Kozyrev

Andrei Kozyrev 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).

  • Oxo-bacteriopyropheophorbide-a carboxylic acid and esters thereof
    Patent number: 7147840
    Abstract: A compound having the structural formula: where R is H or lower alkyl of 1 through 12 carbon atoms. In general, the compounds of the invention are 132-Oxo-bacteriopyropheophorbide—a carboxylic acid and C1–C12 alkyl esters thereof. A method for the preparation of the carboxylic acid compounds of the invention includes the step of reacting bacteriopyropheophorbide—a alkyl ester with lithium hydroxide tetrahydrofuran and water.
    Type: Grant
    Filed: February 25, 2005
    Date of Patent: December 12, 2006
    Assignee: Health Research, Inc.
    Inventors: Ravindra K. Pandey, Andrei Kozyrev, Xiang Zheng
  • OXO-BACTERIOPYROPHEOPHORBIDE-A CARBOXYLIC ACID AND ESTERS THEREOF
    Publication number: 20060111565
    Abstract: A compound having the structural formula: where R is H or lower alkyl of 1 through 12 carbon atoms. In general, the compounds of the invention are 132-Oxo-bacteriopyropheophorbide-a carboxylic acid and C1-C12 alkyl esters thereof. A method for the preparation of the carboxylic acid compounds of the invention includes the step of reacting bacteriopyropheophorbide-a alkyl ester with lithium hydroxide in tetrahydrofuran and water.
    Type: Application
    Filed: February 25, 2005
    Publication date: May 25, 2006
    Applicant: Roswell Park Cancer Institute
    Inventors: Ravindra Pandey, Andrei Kozyrev, Xiang Zheng