Granted Patent
Utility
US 4,400,541 · App. 06/344,718
Process for preparing bis-(diphenylsulfoniophenyl)-sulfide bis-chloride
Inventor:
Shankar S. Iyer
Patented Case
View Patent ↗
Granted: Aug 23, 1983
Filed: Feb 1, 1982
Inventor
Shankar S. Iyer
Assignee (at issue)
Southland 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.