Granted Patent
Utility
US 4,132,713 · App. 05/864,021
Process for the preparation of N-substituted halopyrrolidones
Inventor:
Michael D. Broadhurst
Patented Case
View Patent ↗
Granted: Jan 2, 1979
Filed: Dec 23, 1977
Inventor
Michael D. Broadhurst
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.