Patents by Inventor Ursula Stelkes-Ritter

Ursula Stelkes-Ritter 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 microorganisms containing peptide amidase, microorganisms obtained therewith, peptide amidases contained in them and use thereof
    Patent number: 6333176
    Abstract: A plant peptide amidase from the flavedo of oranges is known; this can be obtained only in small quantities and is seasonal. The proposed new enzymes are microbial peptide amidases which can be obtained from micro-organisms recovered from soil samples in a “double screening” and grown. These microbial peptide amidases are particularly useful for (a) the production of peptides and N-terminal-protected amino acids, (b) racemate splitting of N-protected amino acid amides, (c) obtaining non-proteinogenous D-amino acids, and (d) obtaining new N&agr;-protected D-amino acid amides.
    Type: Grant
    Filed: August 25, 1999
    Date of Patent: December 25, 2001
    Assignee: Degussa Aktiengesellschaft
    Inventors: Ursula Stelkes-Ritter, Maria-Regina Kula, Klaudia Wyzgol, Andreas Bommarius, Michael Schwarm, Karlheinz Drauz
  • Peptide amidase from xanthomonas
    Patent number: 5985632
    Abstract: A plant peptide amidase from the flavedo of oranges is known; this can be obtained only in small quantities and is seasonal. The proposed new enzymes are microbial peptide amidases which can be obtained from micro-organisms recovered from soil samples in a "double screening" and grown. These microbial peptide amidases are particularly useful for (a) the production of peptides and N-terminal-protected amino acids, (b) racemate splitting of N-protected amino acid amides, (c) obtaining non-proteinogenous D-amino acids, and (d) obtaining new N.sub..alpha. -protected D-amino acid amides.
    Type: Grant
    Filed: February 21, 1997
    Date of Patent: November 16, 1999
    Assignee: Degussa Aktiengesellschaft
    Inventors: Ursula Stelkes-Ritter, Maria-Regina Kula, Klaudia Wyzgol, Andreas Bommarius, Michael Schwarm, Karlheinz Drauz