Patents by Inventor Eva Perenyi

Eva Perenyi 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).

  • Industrial process for the synthesis of 2-substituted 1-(hydroxy-ethylidene)-1,1-bisphosfi- conic acids of high purity and the salts thereof
    Patent number: 7612229
    Abstract: Process for the synthesis of high purity 2-substituted-1-(hydroxy-ethylidene)-1,1-bisphosphonic acid of formula (I), the salts and hydrates thereof—wherein the meaning of R is 3?-pyridyl or 2?-amino-ethylidene group—from compounds of formula (II)—wherein the meaning of R is as described above—or salts and hydrates thereof with phosphorous acid in the presence of methanesulfonic acid using phosphorus pentoxide as reagent and in given case the obtained acid is converted into a salt with base.
    Type: Grant
    Filed: January 27, 2004
    Date of Patent: November 3, 2009
    Assignee: Richter Gedeon Vegyeszeti Gyar Rt.
    Inventors: Jozsef Neu, Janos Fischer, Tamas Fodor, Jozsef Törley, Tibor Gizur, Sandor Levai, Adam Demeter, Eva Perenyi
  • Industrial process for the synthesis of 2-substituted 1-(hydroxy-ethylidene)-1,1-bisphosfi- conic acids of high purity and the salts thereof
    Publication number: 20060122395
    Abstract: Process for the synthesis of high purity 2-substituted-1-(hydroxy-ethylidene)-1,1-bisphosphonic acid of formula (I), the salts and hydrates thereof—wherein the meaning of R is 3?-pyridyl or 2?-amino-ethylidene group—from compounds of formula (II)—wherein the meaning of R is as described above—or salts and hydrates thereof with phosphorous acid in the presence of methanesulfonic acid using phosphorus pentoxide as reagent and in given case the obtained acid is converted into a salt with base.
    Type: Application
    Filed: January 27, 2004
    Publication date: June 8, 2006
    Inventors: Jozsef Neu, Janos Fischer, Tamas Fodor, Jozsef Torley, Tibor Gizur, Sandor Levai, Adam Demeter, Eva Perenyi