Granted Patent
Utility
US 5,122,383 · App. 07/702,043
Sorbitan esters as skin permeation enhancers
Inventors:
Sonia J. Heiber, Dinesh C. Patel, Charles D. Ebert
Patented Case
View Patent ↗
Granted: Jun 16, 1992
Filed: May 17, 1991
Inventors
Sonia J. Heiber
Dinesh C. Patel
Charles D. Ebert
Assignee (at issue)
TheraTech, 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.