Granted Patent
Utility
US 6,113,938 · App. 09/121,835
Beneficial agent delivery system with membrane plug and method for controlling delivery of beneficial agents
Inventors:
Guohua Chen, Scott D. Lautenbach, Keith E. Dionne, Lawton Hom
Patented Case
View Patent ↗
Granted: Sep 5, 2000
Filed: Jul 24, 1998
Inventors
Guohua Chen
Scott D. Lautenbach
Keith E. Dionne
Lawton Hom
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.