Granted Patent
Utility
US 4,634,771 · App. 06/759,003
Method for converting carboxylic acid groups to trichloromethyl groups
Inventors:
Kyung S. Shim, Arthur D. F. Toy, James B. Heather
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jul 25, 1985
Inventors
Kyung S. Shim
Arthur D. F. Toy
James B. Heather
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.