Granted Patent
Utility
US 5,871,985 · App. 08/294,149
Particulate non cross-linked chitosan core matrices for encapsulated cells
Inventors:
Patrick Aebischer, Beth A. Zielinski
Patented Case
View Patent ↗
Granted: Feb 16, 1999
Filed: Aug 22, 1994
Inventors
Patrick Aebischer
Beth A. Zielinski
Assignee (at issue)
Brown University Research Foundation
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.