Granted Patent
Utility
US 6,794,464 · App. 10/298,195
Membrane or matrix for controlling the permeation rate of drugs
Inventors:
Harri Jukarainen, Tommi Markkula, Juha Ala-Sorvari, Matti Lehtinen, Jarkko Ruohonen
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Nov 18, 2002
Inventors
Harri Jukarainen
Tommi Markkula
Juha Ala-Sorvari
Matti Lehtinen
Jarkko Ruohonen
Assignee (at issue)
Schering Oy
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.