Patents by Inventor Adriana M. Riemens

Adriana M. Riemens 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).

  • Mutated penicillin G acylase genes
    Patent number: 6033823
    Abstract: New mutant .beta.-lactam Penicillin G acylases are provided, exhibiting altered substrate specificities. These Penicillin G acylases are obtained by expression of a gene encoding said Penicillin G acylase and having an amino acid sequence which differs at least in one amino acid from the wild-type Penicillin G acylase.
    Type: Grant
    Filed: April 5, 1999
    Date of Patent: March 7, 2000
    Inventors: Jan M. Van Der Laan, Adriana M. Riemens, Wilhelmus J. Quax
  • Mutated penicillin G acylase genes
    Patent number: 5891703
    Abstract: New mutant .beta.-lactam Penicillin G acylases are provided, exhibiting altered substrate specificities. These Penicillin G acylases are obtained by expression of a gene encoding for said Penicillin G acylase and having an amino acid sequence which differs at least in one amino acid from the wild-type Penicillin G acylase.
    Type: Grant
    Filed: April 23, 1997
    Date of Patent: April 6, 1999
    Assignee: Gist-Hrocades
    Inventors: Jan M. Van Der Laan, Adriana M. Riemens, Wilhelmus J. Quax