Granted Patent
Utility
US 6,569,409 · App. 09/743,224
Method for providing dibenzoylmethane derivatives with light stability
Inventors:
Isabelle Hansenne, Martin Josso
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Mar 23, 2001
Inventors
Isabelle Hansenne
Martin Josso
Assignee (at issue)
L'Oreal S.A.
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.