Granted Patent
Utility
US 4,963,641 · App. 07/359,181
Polyester with improved gas barrier properties from cycloalkylidene bis (p-phenyleneoxy) diacetic acid
Inventor:
Burns Davis
Patented Case
View Patent ↗
Granted: Oct 16, 1990
Filed: May 30, 1989
Inventor
Burns Davis
Assignee (at issue)
EASTMAN KODAK 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.