Patents by Inventor Grigory Iosifich Rutman

Grigory Iosifich Rutman 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 of producing 2,2 '-methylenebis(4,6-dialkylphenols)
    Patent number: 4087469
    Abstract: A method of producing 2,2'-methylenebis(4,6-dialkylphenols) residing in that 2,4-dialkylphenols interact with acetals in the presence of an acid catalyst at a temperature from 30.degree. C to 140.degree. C with the formation of a reaction mixture containing the desired product and with subsequent separation of the desired product from said mixture, the starting reagents being taken in amounts of 1 mole of 2,4-dialkylphenol per 1-10 moles of acetal.The method is technologically simple and accomplished without the formation of waste water.
    Type: Grant
    Filed: December 16, 1975
    Date of Patent: May 2, 1978
    Inventors: Yakov Abramovich Gurvich, Alexandr Afroimovich Grinberg, Alexandr Grigorievich Liakumovich, Jury Ivanovich Michurov, Olga Fedorovna Starikova, Vladimir Avgustovich Yanshevsky, Simona Tevievna Kumok, Evgeny Lvovich Styskin, Grigory Iosifich Rutman