Granted Patent
Utility
US 5,603,953 · App. 08/424,511
Supported liquid membrane delivery devices
Inventors:
Scott M. Herbig, Kelly L. Smith, Paul van Eikeren, James B. West
Patented Case
View Patent ↗
Granted: Feb 18, 1997
Filed: May 23, 1995
Inventors
Scott M. Herbig
Kelly L. Smith
Paul van Eikeren
James B. West
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.