Granted Patent
Utility
US 6,657,067 · App. 10/063,112
Method for the manufacture of chlorophthalic anhydride
Inventors:
Robert Edgar Colborn, David Bruce Hall, Peter Koch, Gerald Oeckel
Patented Case
View Patent ↗
Granted: Dec 2, 2003
Filed: Mar 22, 2002
Inventors
Robert Edgar Colborn
David Bruce Hall
Peter Koch
Gerald Oeckel
Assignee (at issue)
General Electric 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.