Granted Patent
Utility
US 4,134,909 · App. 05/811,054
3-Methoxy-4-arylsulphonyloxy-acetophenones
Inventors:
Charles Pigerol, Paul de Cointet de Fillain, Yves Bazile, Michel Chignac, Claude Grain
Patented Case
View Patent ↗
Granted: Jan 16, 1979
Filed: Jun 29, 1977
Inventors
Charles Pigerol
Paul de Cointet de Fillain
Yves Bazile
Michel Chignac
Claude Grain
Assignee (at issue)
Labaz
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.