Granted Patent
Utility
US 6,803,082 · App. 10/628,077
Methods for the late introduction of additives into polyethylene terephthalate
Inventors:
Carl Steven Nichols, Tony Clifford Moore
Patented Case
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Granted: Oct 12, 2004
Filed: Jul 25, 2003
Inventors
Carl Steven Nichols
Tony Clifford Moore
Assignee (at issue)
Wellman Inc.
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.