Patents by Inventor Laszlo Litkei

Laszlo Litkei 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).

  • Non-hygroscopic monoammonium salts of phosphonic acids or phosphinic acids
    Patent number: 5543562
    Abstract: A solid, non-hygroscopic salt of the Formula (I) ##STR1## wherein R.sup.1 is hydroxy or alkyl;A is C.sub.1 to C.sub.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: August 6, 1996
    Assignee: Monsanto Europe S.A./N.V.
    Inventors: Fulgencio Powell Moreno, Laszlo Litkei, Vilmos Galamb, Imre Gulyas, Jan os Repasi, Agota Repasine Veres, Jozsef Vigh, Istvanne Koczka, Edit Fehervari, Laszlone Roka, Laszlone Pethe, Jozsef Neu
  • Non-hygroscopic monoammonium salts of phosphonic and phosphinic acids
    Patent number: 5410075
    Abstract: A solid, non-hygroscopic salt of the Formula (I) ##STR1## wherein R.sup.1 is dydroxy or alkyl;A is C.sub.1 to C.sub.
    Type: Grant
    Filed: February 4, 1994
    Date of Patent: April 25, 1995
    Assignee: Alkaloida Vegyeszeti Gyar Rt.
    Inventors: Fulgencio Powell Moreno, Laszlo Litkei, Vilmos Galamb, Imre Gulyas, Janos Repasi, Agota Repasine Veres, Jozsef Vigh, Istvanne Koczka, Edit Fehervari, Laszlone Roka, Laszlone Pethe, Jozsef Neu
  • Non-hygroscopic monoammonium salts of phosphonic and phosphinic acids
    Patent number: 5324708
    Abstract: A solid, non-hygroscopic salt of the Formula (I) ##STR1## wherein R.sup.1 is hydroxy or alkyl;A is C.sub.1 to C.sub.
    Type: Grant
    Filed: April 16, 1992
    Date of Patent: June 28, 1994
    Assignee: Aklaloida Vegyeszeti Gyar Rt.
    Inventors: Fulgencio P. Moreno, Laszlo Litkei, Vilmos Galamb, Imre Gulyas, Janos Repasi, Agota R. Veres, Jozsef Vigh, Istavanne Koczka, Edit Fehervari, Laszlone Roka, Laszlone Pethe, Jozsef Neu
  • 7,8-Dihydroisomorphine derivative, namely azidoethylmorphine
    Patent number: 4167636
    Abstract: Azidoethylmorphine, a new 7,8-dihydroisomorphine derivative, has excellent antitussive effects without respiration depression.
    Type: Grant
    Filed: March 29, 1978
    Date of Patent: September 11, 1979
    Assignee: Chinoin Gyogyszer es Vegyeszeti
    Inventors: Rezso Bognar, Sandor Makleit, Geza Kiss, Sandor Berenyi, Terez Mile, Jozsef Knoll, Sandor Elek, Istvan Gyoker, Attila Zoltai, Gyorgy Toth, Laszlo Litkei
  • 6-Deoxy-6-azido-14-hydroxy-7,8-dihydroisomorphine or a pharmaceutically acceptable salt thereof
    Patent number: 4144236
    Abstract: A process for the preparation of pharmaceutically acceptable 3-protected derivatives of 6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine, selected from the group which consists of 3-O-acetyl-6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine, 3-O-tetrahydropyranyl-6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine and 3-O-methylenemethoxy-6-deoxy-6-azido-14-hydroxy-7, 8-dihydroisomorphine, and the salts of these compounds which comprise the following steps:Blockin the hydroxy in position 3 of 14-hydroxy-7, 8-dihydromorphine with a moiety selected from the group which consists of acetyl, tetrahydropyranyl, and methylenemethoxy; andAzidiylating position 6 of the compounds formed in a step (a) thereby removing the hydroxy formerly in that position.
    Type: Grant
    Filed: May 10, 1977
    Date of Patent: March 13, 1979
    Assignee: Alkaloida Vegyeszeti Gyar Tiszavasvari
    Inventors: Reszo Bognar, Sandor Makleit, Geza Kiss, Sandor Berenyi, Terez Mile, Jozsef Knoll, Sandor Elek, Istvan Gyoker, Attila Zoltai, Gyorgy Toth, Laszlo Litkei