Granted Patent
Utility
US 4,956,443 · App. 07/358,229
Polyester from hydroxyethoxyphenoxy acetic acid with improve gas barrier properties
Inventors:
James R. Overton, Steven Lee Stafford, Charles Sumner
Patented Case
View Patent ↗
Granted: Sep 11, 1990
Filed: May 30, 1989
Inventors
James R. Overton
Steven Lee Stafford
Charles Sumner
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.