Granted Patent
Utility
US 4,578,437 · App. 06/662,643
Copolyester/polyester blends having reduced carbon dioxide permeability
Inventors:
Ronald R. Light, Robert W. Seymour
Patented Case
View Patent ↗
Granted: Mar 25, 1986
Filed: Oct 19, 1984
Inventors
Ronald R. Light
Robert W. Seymour
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.