Patents by Inventor Tamas U. Kallay

Tamas U. Kallay 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 the preparation of pharmaceutical compositions
    Patent number: 4960913
    Abstract: The invention relates to a process for the preparation of tetracycline derivatives of the formula ##STR1## and acid addition salts thereof --wherein R stands for --CH.sub.3 or .dbd.CH.sub.2 --by dehalogenating and hydrogenating chloromethacycline or acid addition salt thereof of the formula ##STR2## or by hydrating methacycline or acid addition salts thereof of the formula ##STR3## by treatment with hydrogen gas in the presence of a noble metal alloy catalyst on carrier and organic solvent which comprises performing, hydrogenating under pressure of 0.1-1.0 MPa with an alloy catalyst consisting of the alloy palladium or platinum and selenium and/or tellurium used at a ratio of 1:0.01-0.5 related to the amount of the starting tetracycline and carrying out, if desired dehalogenation and hydrogenation in one step.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: October 2, 1990
    Assignee: Chinoin Gyogyszer- es Vegyeszeti Termekek Gyara Rt.
    Inventors: Erzsebet Szalay, Gyorgy Lugosi, Tamas U. Kallay, Zsuzsanna Nad, Istvan Jelinek, Vilmos Simonidesz, Peter Gyory, Lajos Nagy, Marta Lugosi, Ilona Santa nee Singola, Gabor Besenyei, Laszlo Simandi
  • Process for the preparation of substituted-phenyl-N-alkyl-carbamates
    Patent number: 4150034
    Abstract: A process for the preparation of a substituted-phenyl-N-alkyl-carbamate of the formula ##STR1## wherein R.sup.1 and R.sup.2 form part of a carbamoyloxy group and are identical or different and each is hydrogen or lower alkyl,R is halogen, formyl group or a group of the formula ##STR2## in ortho or meta-position to the carbamoyloxy group, wherein X.sup.1 and X.sup.2 are identical or different and each is oxygen or sulphur andR.sup.3 and R.sup.4 are identical or different and each is alkyl, alkenyl or alkynyl or together form a 5-membered saturated or unsaturated heterocycle in which X.sup.1 and X.sup.2 are heteroatoms, said process comprising reacting a compound of the formula ##STR3## in the presence of a base with a compound of the formula ##STR4## wherein A is phenyl substituted with two or more electron withdragroups.
    Type: Grant
    Filed: August 10, 1977
    Date of Patent: April 17, 1979
    Assignee: Chinoin Gyogyszer es Vegyeszeti Termekek Gyara Rt.
    Inventors: Tamas U. Kallay, Gabor Szabo, Geza Toth, Kalman Harsanyi