Patents by Inventor Alfons E. Hartl

Alfons E. Hartl 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).

  • Method of isomerizing humulone to isohumulone by catalytic acceleration with metal salts
    Patent number: 4234516
    Abstract: The isomerization of humulone or a humulone-containing material is carried out by isomerization at elevated temperature and a pH below 9 in a liquid medium containing at least one salt of a bi-valent metal or of cerium.
    Type: Grant
    Filed: June 2, 1975
    Date of Patent: November 18, 1980
    Assignee: Atlantic Research Institute Limited
    Inventors: Horst Koller, Alfons E. Hartl, Gerhard Kirchner
  • Method of isomerizing humulone to isohumulone by catalytic acceleration with metal salts
    Patent number: 3952061
    Abstract: The isomerization of humulone or a humulone-containing material is carried out by isomerization at elevated temperatures and a pH below 9 in a liquid medium containing at least one salt of a bi-valent metal or of cerium.
    Type: Grant
    Filed: May 30, 1973
    Date of Patent: April 20, 1976
    Assignee: Atlantic Research Institute Limited
    Inventors: Horst Koller, Alfons E. Hartl, Gerhard Kirchner