Granted Patent
Utility
US 6,224,794 · App. 09/305,857
Methods for microsphere production
Inventors:
Brian G. Amsden, Richard Liggins
Patented Case
View Patent ↗
Granted: May 1, 2001
Filed: May 5, 1999
Inventors
Brian G. Amsden
Richard Liggins
Assignee (at issue)
Angiotech Pharmaceuticals, Inc.
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.