Patents by Inventor Bart Van Hell

Bart Van Hell 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).

  • Strains of phaffia rhodozyma containing high levels of astaxanthin and low levels of 3-hydroxy-3', 4'-didehydro-.beta., .psi.-caroten-4-one (HDCO)
    Patent number: 5879927
    Abstract: The present invention provides Phaffia rhodozyma strains having increased levels of astaxantin and a low percentage of 3-hydroxy-3',4'-didehydro-.beta.,.psi.-caroten-4-one (HDCO). Such strains are obtained by a combination of mutagenesis and selection. The invention further provides a method for obtaining such strains. The invention also provides astaxanthin obtained from a mutagenized strain of Phaffia rhodozyma characterized in that it contains a decreased relative amount of HDCO.
    Type: Grant
    Filed: March 28, 1997
    Date of Patent: March 9, 1999
    Assignee: Gist-Brocades, B.V.
    Inventors: Lex De Boer, Bart Van Hell, Andreas Jacobus Johanna Krouwer
  • Strains of Phaffia rhodozyma containing high levels of astaxanthin and low levels of 3-hydroxy-3',4'-didehydro-.beta., .PSI.-caroten-4-one (HDCO)
    Patent number: 5648261
    Abstract: The present invention provides Phaffia rhodozyma strains having increased levels of astaxantin and a low percentage of 3-hydroxy-3',4'-didehydro-.beta.,.psi.-caroten-4-one (HDCO). Such strains are obtained by a combination of mutagenesis and selection. The invention further provides a method for obtaining such strains. The invention also provides astaxanthin obtained from a mutagenized strain of Phaffia rhodozyma characterized in that it contains a decreased relative amount of HDCO.
    Type: Grant
    Filed: October 12, 1993
    Date of Patent: July 15, 1997
    Assignee: Gist-brocades, N.V.
    Inventors: Lex De Boer, Bart Van Hell, Andreas Jacobus Johanna Krouwer