Granted Patent
Utility
US 4,675,447 · App. 06/842,693
Method for preparation of alkylsulfonyl alkylchlorobenzenes
Inventor:
Charles N. Ludvik
Patented Case
View Patent ↗
Granted: Jun 23, 1987
Filed: Mar 21, 1986
Inventor
Charles N. Ludvik
Assignee (at issue)
Stauffer Chemical Company
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.