Granted Patent
Utility
US 4,897,453 · App. 07/226,007
Compatible blends of polyester-ethers and polycarbonates
Inventors:
Thomas E. Flora, Robert W. Seymour
Patented Case
View Patent ↗
Granted: Jan 30, 1990
Filed: Jul 29, 1988
Inventors
Thomas E. Flora
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.