Granted Patent
Utility
US 4,634,745 · App. 06/840,482
Terpolymer production
Inventors:
Raymond J. Ehrig, John J. Godfrey
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Mar 14, 1986
Inventors
Raymond J. Ehrig
John J. Godfrey
Assignee (at issue)
United States Steel 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.