Patents by Inventor Yan R. Uldrikis

Yan R. Uldrikis 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).

  • Bornyl and isobornyl esters of carboxylic acids of condensed tetrahydroquinoxalines
    Patent number: 5166348
    Abstract: Bornyl and isobornyl esters of carboxylic acids of condensed tetrahydroquinoxalines having the general formula ##STR1## where R.sup.1 is CH.sub.3 or C.sub.2 H.sub.5 ##STR2## where R.sup.2 is ##STR3## The proposed compounds are active against viruses and can therefore be used in medicine.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: November 24, 1992
    Assignees: Uralsky politekhnichesky institut, Institut organicheskogo sinteza AN Latvii
    Inventors: Oleg N. Chupakhin, Valery N. Charushin, Galina M. Petrova, Mikhail G. Ponizovsky, Vasily G. Baklykov, Gunar Y. Dubur, Egils A. Biseniex, Yan R. Uldrikis, Oleg U. Kiselev, Vera I. Ilienko, Vitaly G. Platonov, Valentina M. Guseva
  • Alkoxy-and phenoxy alkyl esters of 2,6-dimethyl-4-(2-difluoromethoxyphenyl)-1,4-dihydropyridine-3,5-carboxy lic acid
    Patent number: 4845109
    Abstract: Novel compounds, that is, alkoxy- and phenoxy-alkyl esters of 2,6-dimethyl-4-(2-difluoromethoxyphenyl)-1,4-dihydropyridine-3,5-dicarboxy li c acid have the following general formula useful for producing hypotensive and vasodilation effects.
    Type: Grant
    Filed: July 8, 1988
    Date of Patent: July 4, 1989
    Inventors: Natalya V. Makarova, Egils A. Biseniex, Yan R. Uldrikis, Gunar Y. Dubur, Maris M. Veveris, Agris A. Kimenis
  • Preparation for preventing and treatment of skin radiation burn lesions
    Patent number: 4769382
    Abstract: A preparation for prevention and treatment of radiation burning lesions of the skin comprising an active principle, viz. 2,6-dimethyl-3,5-diethoxycarbonyl-1,4-dihydropyridine of the following formula: ##STR1## and a pharmaceutically acceptable diluent.
    Type: Grant
    Filed: September 17, 1986
    Date of Patent: September 6, 1988
    Assignees: Institut Organischeskogo Sinteza Leningradsky Nauchno-Issledovatelsky Institut, Radiatsionnoi Gigieny
    Inventors: Gunar Y. Dubur, Egils A. Biseniex, Yan R. Uldrikis, Evgeny V. Ivanov, Tatyana V. Ponomareva, Gennady N. Merkushev, Jury O. Yakubovsky-Lipsky
  • 2,6-Dimethyl-3,5-bis-(1-adamantylhydr oxycarbonyl)-4-(2-difluoromethoxyphenyl)-1,4-dihydropyridine
    Patent number: 4487932
    Abstract: A compound 2,6-dimethyl-3,5-bis-(1-adamantylhydroxycarbonyl)-4-(2-difluoromethoxyphen yl)-1,4-dihydropyridine of the formula ##STR1## is proposed. Said compound possesses antianginal activity.
    Type: Grant
    Filed: April 19, 1983
    Date of Patent: December 11, 1984
    Assignee: Institut Organicheskogo Sinteza Akademii Nauk Latviiskoi
    Inventors: Egils A. Biseniex, Maris M. Veveris, Gunar Y. Dubur, Yanis J. Polis, Yan R. Uldrikis, Natalia V. Barmenkova, Agris A. Kimenis
  • 2-(2,6-Dimethyl-3,5-diethoxycarbonyl-1,4-dihydropyridine-4-carboxamide glutaric acid its disodium salt and method of their preparation
    Patent number: 4485239
    Abstract: 2-(2,6-dimethyl-3,5-diethoxycarbonyl-1,4-dihydropyridine-4-carboxamide) glutaric acid of formula I and its disodium salt of formula II ##STR1## Said acid is obtained from glutaminic acid and dimethyl 3,5-diethoxycarbonyl-1,4-dihydroisonicotic acid.For obtaining disodium salt, said acid is reacted with a caustic soda solution.These compounds possess antiarrhythmic activity.
    Type: Grant
    Filed: September 28, 1983
    Date of Patent: November 27, 1984
    Assignee: Institut Organicheskogo Sinteza Akademii Nauk Latviiskoi SSR
    Inventors: Egils A. Biseniex, Gunar Y. Dubur, Yan R. Uldrikis, Maris M. Veveris, Agris A. Kimenis, Evgeny V. Ivanov
  • 2,6-Dimethyl-1,4-dihydropyridine-3,5-dicarboxylic acid esters and method for preparing same
    Patent number: 4293700
    Abstract: 2,6-Dimethyl-1,4-dihydropyridine-3,5-dicarboxylic acid esters of the general formula: ##STR1## wherein R is a substituted alkyl or terpenyl. A method for preparing said esters comprises reacting esters of acetoacetic acid of the general formula: CH.sub.3 COCH.sub.2 COOR, wherein R is a substituted alkyl or terpenyl, with hexamethylenetetramine in the presence of ammonium acetate in ethanol at its boiling temperature; said esters of acetoacetic acid of the above general formula, hexamethylenetetramine and ammonium acetate can be used in stoichiometric proportions.
    Type: Grant
    Filed: April 3, 1980
    Date of Patent: October 6, 1981
    Inventors: Yan R. Uldrikis, Ieva E. Preisa, Gunar Y. Dubur, Aina A. Zidermane, Egils A. Biseniex, Gunar D. Tirzit