Granted Patent
Utility
US 4,634,744 · App. 06/689,953
Method of catalyst deactivation
Inventors:
Yu-Tang Hwang, Lloyd Pebsworth, Robert A. Dombro, Raymond E. Hoff
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Jan 9, 1985
Inventors
Yu-Tang Hwang
Lloyd Pebsworth
Robert A. Dombro
Raymond E. Hoff
Assignee (at issue)
Chemplex, Ltd.
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.