Granted Patent
Utility
US 4,334,090 · App. 06/208,348
Slurries of terephthalic acid in ethylene glycol
Inventor:
Peter Donaldson
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Nov 19, 1980
Inventor
Peter Donaldson
Assignee (at issue)
IMPERIAL CHEMICAL INDUSTRIES LIMITED
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.