Patents by Inventor Janos Besan

Janos Besan 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 1,2,4-triazole
    Patent number: 4490539
    Abstract: A process for the preparation of 1,2,4-triazole by reacting hydrazine, formic acid and formamide and/or ammonia in a molar ratio of 1 mole of hydrazine to 1 to 3 moles of formic acid to 1 to 2 moles of formamide and/or ammonia at a temperature of 140.degree. to 220.degree. C. The main advantage of the process of the invention resides in obtaining 1,2,4-triazole with an improved yield and purity.
    Type: Grant
    Filed: June 22, 1982
    Date of Patent: December 25, 1984
    Assignee: Nehezvegyipari Kutato Intezet
    Inventors: Janos Besan, Miklos Kovacs, Laszlo Kulcsar, Ferenc Maier, Jozsef Pernyeszi