Patents by Inventor Boris P. Grishin

Boris P. Grishin 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).

  • Process for producing high-molecular polyacetals
    Patent number: 4340720
    Abstract: A process for producing high-molecular polyacetals, comprising polymerization of gaseous formaldehyde or copolymerization thereof with cyclic formals or cyclic oxides; formaldehyde is admitted into the reaction zone in a gas mixture which is the product of catalytic oxidative dehydrogenation of methanol, wherefrom H.sub.2 O, CH.sub.3 OH and H COOH contaminants have been preliminarily removed. The process of polymerization or copolymerization is carried out in an inert hydrocarbon solvent in the presence of an ionic-type catalyst at a temperature within the range of from -50.degree. to +120.degree. C. with the formation of a vapor phase which is removed from the reaction zone.
    Type: Grant
    Filed: July 30, 1981
    Date of Patent: July 20, 1982
    Inventors: Boris P. Grishin, Alexandr G. Gruznov, Leonid M. Romanov, Julian I. Vishnyak, Nina A. Shugaeva, Nikolai M. Bychkov, Konstantin V. Lipets, Alexandr I. Zotov