Granted Patent
Utility
US 6,558,937 · App. 09/463,712
Cellulose degrading enzymes of aspergillus
Inventors:
Marcus Matheus Catharina Gielkens, Jacob Visser, Leendert Hendrik De Graaff
Patented Case
View Patent ↗
Granted: May 6, 2003
Filed: Apr 4, 2000
Inventors
Marcus Matheus Catharina Gielkens
Jacob Visser
Leendert Hendrik De Graaff
Assignee (at issue)
DSM 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.