Granted Patent
Utility
US 5,674,852 · App. 08/318,870
Water-soluble retinoids
Inventors:
Thomas Maier, Helmut Luther
Patented Case
View Patent ↗
Granted: Oct 7, 1997
Filed: Oct 18, 1994
Inventors
Thomas Maier
Helmut Luther
Assignee (at issue)
Ciba-Geigy
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.