Granted Patent
Utility
US 5,115,047 · App. 07/706,316
Copolyester, polyester composition containing the copolyester, and polyester laminated structure having layer composed of the copolyester or the polyester composition
Inventors:
Mikio Hashimoto, Norio Kaneshige
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: May 28, 1991
Inventors
Mikio Hashimoto
Norio Kaneshige
Assignee (at issue)
Mitsui Petrochemical Industries, Ltd.
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.