Granted Patent
Utility
US 5,876,752 · App. 07/969,844
Use of interfacially-polymerized membranes in delivery devices
Inventors:
Scott M. Herbig, Richard W. Korsmeyer, Avinash Thombre
Patented Case
View Patent ↗
Granted: Mar 2, 1999
Filed: Feb 3, 1993
Inventors
Scott M. Herbig
Richard W. Korsmeyer
Avinash Thombre
Assignee (at issue)
Pfizer 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.