Granted Patent
Utility
US 6,375,978 · App. 09/213,213
Rate controlling membranes for controlled drug delivery devices
Inventors:
Lothar W. Kleiner, Robert M. Gale, Randall G. Berggren, Gilbert T. Tong, Guohua Chen, Keith E. Dionne, Paul R. Houston
Patented Case
View Patent ↗
Granted: Apr 23, 2002
Filed: Dec 17, 1998
Inventors
Lothar W. Kleiner
Robert M. Gale
Randall G. Berggren
Gilbert T. Tong
Guohua Chen
Keith E. Dionne
Paul R. Houston
Assignee (at issue)
ALZA 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.