Patents by Inventor Yan Alexandrovich Surna

Yan Alexandrovich Surna 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).

  • Salt of b-diethylaminoethyl ester of p-aminobenzoic acid with acetal of polyvinyl alcohol and glyoxalic and method of preparing same
    Patent number: 3943150
    Abstract: A salt of .beta.-diethylaminoethyl ester of p-aminobenzoic acid with the acetal of polyvinyl alcohol and glyoxalic acid which has the formula: ##EQU1## wherein n is a degree of polymerization within the range of from 100 to 1,200; x is a degree of substitution within the range of from 5 to 30 mol.%. The compound has local anaesthetic properties.A method of preparing said salt of .beta.-diethylaminoethyl ester of p-aminobenzoic acid and the acetal of polyvinyl alcohol and glyoxalic acid which comprises reacting the acetal of polyvinyl alcohol and glyoxalic acid with .beta.-diethylaminoethyl ester of p-aminobenzoic acid in an aqueous medium, followed by isolating the desired product from the resulting solution.
    Type: Grant
    Filed: April 26, 1974
    Date of Patent: March 9, 1976
    Inventors: Nadezhda Alexandrovna Kashkina, Milda Yanovna Pormale, Arvid Yanovich Kalnish, Yan Alexandrovich Surna