Granted Patent
Utility
US 5,753,485 · App. 08/590,957
Purified mixture of collagenase I, collagenase II and two other proteases
Inventors:
Francis E. Dwulet, Bernice B. Ellis, John Gill, Linda B. Jacobsen, Marilyn E. Smith, David G. Waters
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Jan 24, 1996
Inventors
Francis E. Dwulet
Bernice B. Ellis
John Gill
Linda B. Jacobsen
Marilyn E. Smith
David G. Waters
Assignee (at issue)
Boehringer Mannheim GmbH
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.