Patents by Inventor Winifried Orth

Winifried Orth 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 production of zinc 2-mercaptopyridine N-oxide
    Patent number: 4659830
    Abstract: The present invention relates to a process for the preparation of zinc 2-mercaptopyridine-N-oxide in a readily filterable, washable and easily suspendable form which comprises reacting an aqueous solution of an alkali metal salt of 2-mercaptopyridine N-oxide with an aqueous solution of a water soluble zinc salt at a temperature of 35.degree. to 100.degree. C. in the presence of an at least partially water soluble organic solvent to form a precipitate of zinc 2-mercaptopyridine-N-oxide, recovering the said crystals and optionally comminuting the crystals.
    Type: Grant
    Filed: July 15, 1986
    Date of Patent: April 21, 1987
    Assignee: Rutgerswerke Aktiengesellschaft
    Inventors: Manfred Maurer, Winifried Orth, Werner Fickert
  • Process for production of zinc 2-mercaptopyridine-n-oxide
    Patent number: 4632991
    Abstract: The present invention relates to a process for the preparation of zinc 2-mercaptopyridine-N-oxide in a readily filterable, washable and easily suspendable form which comprises reacting an aqueous solution of an alkali metal salt of 2-mercaptopyridine-N-oxide with an aqueous solution of a water soluble zinc salt at a temperature of 35.degree. to 100.degree. C. in the presence of an at least partially water soluble organic solvent to form a precipitate of zinc 2-mercaptopyridine-N-oxide, recovering the said crystals and optionally comminuting the crystals.
    Type: Grant
    Filed: January 25, 1985
    Date of Patent: December 30, 1986
    Assignee: Rutgerswerke AG
    Inventors: Manfred Maurer, Winifried Orth, Werner Fickert