Granted Patent
Utility
US 5,648,261 · App. 08/107,811
Strains of Phaffia rhodozyma containing high levels of astaxanthin and low levels of 3-hydroxy-3',4'-didehydro-.beta., .PSI.-caroten-4-one (HDCO)
Inventors:
Lex De Boer, Bart Van Hell, Andreas Jacobus Johanna Krouwer
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Oct 12, 1993
Inventors
Lex De Boer
Bart Van Hell
Andreas Jacobus Johanna Krouwer
Assignee (at issue)
Gist-Brocades N.V.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.