Granted Patent
Utility
US 5,698,734 · App. 08/668,756
Process for the production of purified terephthalic acid
Inventors:
John A. Turner, Eric Hindmarsh, David Parker, Ian Peter Milne
Patented Case
View Patent ↗
Granted: Dec 16, 1997
Filed: Jun 24, 1996
Inventors
John A. Turner
Eric Hindmarsh
David Parker
Ian Peter Milne
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.