Granted Patent
Utility
US 5,006,613 · App. 07/560,653
Tricomponent polymer blends of poly(ethylene tereptholate), poly(ethylene naphthalate) and a copolyester
Inventors:
Freddie A. Shepherd, Ronald R. Light
Patented Case
View Patent ↗
Granted: Apr 9, 1991
Filed: Jul 30, 1990
Inventors
Freddie A. Shepherd
Ronald R. Light
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.