Patents by Inventor Miha Japelj

Miha Japelj 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 resolution of racemic alpha-aminonitriles
    Patent number: 4187244
    Abstract: Process for the resolution of certain racemic .alpha.-aminonitriles into optically active enantiomers which includes treating the racemic .alpha.-aminonitriles with (-)-mandelic acid in an alkanol/C.sub.5-8 hydrocarbon mixture to obtain a racemic mixture of diastereoisomeric D and L salts of (-)-mandelic acid, macerating the salts with an alkanol/C.sub.5-8 hydrocarbon mixture; neutralizing the L-form; extracting the neutralized product; and converting it into a stable form.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: February 5, 1980
    Assignee: KRKA, Farmaceutika, Kemija, Kozmetika, zdravilisca in gostinstuo, Novo mesto, n.sd.o.
    Inventors: Marijan Hohnjec, Miha Japelj
  • Process for the resolution of racemic .alpha.-aminonitriles
    Patent number: 4183865
    Abstract: Process for the resolution of certain racemic .alpha.-aminonitriles into optically active enantiomers which includes treating the racemic .alpha.-aminonitriles with (-)-dibenzoyl-tartaric acid in polar solvents to obtain a racemic mixture of diastereoisomeric D and L salts of (-)-dibenzoyl-tartaric acid, macerating the salts with dioxane, neutralizing the L-form, extracting the neutralized product, and converting it into a stable form.
    Type: Grant
    Filed: March 30, 1978
    Date of Patent: January 15, 1980
    Assignee: KRKA, farmacevtika, kemija, kozmetika, zdravilisca in gostinstvo, Novo mesto, n.sol.o.
    Inventors: Marijan Hohnjec, Miha Japelj