Granted Patent
Utility
US 5,780,443 · App. 08/624,379
Water-soluble retinoids
Inventors:
Thomas Maier, Helmut Luther
Patented Case
View Patent ↗
Granted: Jul 14, 1998
Filed: Apr 3, 1996
Inventors
Thomas Maier
Helmut Luther
Assignee (at issue)
Ciba Specialty Chemicals 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.