Granted Patent
Utility
US 5,551,515 · App. 08/450,899
Hemicellulase active at extremes of Ph and temperature and utilizing the enzyme in oil wells
Inventors:
Douglas W. Fodge, David M. Anderson, Thomas M. Pettey
Patented Case
View Patent ↗
Granted: Sep 3, 1996
Filed: May 26, 1995
Inventors
Douglas W. Fodge
David M. Anderson
Thomas M. Pettey
Assignee (at issue)
Chemgen Corporation
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.