Patents by Inventor Rustam G. Mardanov

Rustam G. Mardanov 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).

  • Method for purification of 2,2'-di(1,6,7-trihydroxy-3-methyl-5-isopropyl-8-naphthaldehyde)
    Patent number: 5059717
    Abstract: The method according to the present invention comprises purification of 2,2'-di-(1,6,7-trihydroxy-3-methyl-5-isopropyl-8-naphthaldehyde) by crystallization from a solution thereof in diethyl ether with a concentration of 0.002-0.2 g/ml by adding 0.25-3 parts of hexane by volume (of diethyl ether) keeping the mixture at a temperature of from 10.degree. to 30.degree. C., separation of the resulting precipitate and drying thereof to give the desired product.
    Type: Grant
    Filed: July 16, 1990
    Date of Patent: October 22, 1991
    Inventors: Bakhtiyar T. Ibragimov, Samat A. Talipov, Rustam G. Mardanov, Takhir F. Aripov