Patents by Inventor Fritz Schafer

Fritz Schafer 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 obtaining D,L-homocystine (II)
    Patent number: 4550200
    Abstract: D,L-Homocystine is obtained by introducing molecular oxygen into an aqueous solution of the disodium salt of D,L-homocysteine having a concentration between 0.8 and 1.2 moles/l and an initial pH between 7.0 and 8.0 in the presence of a catalytic amount of iron(III) ions until there is no longer an increase in pH and subsequently adjusting the pH to about 5.3 with stirring.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: October 29, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Michael Karrenbauer, Axel Kleemann, Theodor Lussling, Fritz Schafer
  • Process for obtaining D,L-homocystine (I)
    Patent number: 4550199
    Abstract: D,L-Homocystine is obtained by treating an aqueous solution of the disodium salt of D,L-homocysteine having a concentration between 0.4 and 1.6 moles/l and an initial pH between 7.0 and 8.0 under vigorous stirring with at least the equivalent amount of an aqueous solution of hydrogen peroxide and after the end of the oxidation adjusting the pH to about 5.3. The hydrogen peroxide solution can be employed with a concentration between 20 and 60 weight percent.
    Type: Grant
    Filed: March 15, 1984
    Date of Patent: October 29, 1985
    Assignee: Degussa Aktiengesellschaft
    Inventors: Michael Karrenbauer, Axel Kleemann, Theodor Lussling, Fritz Schafer