Granted Patent
Utility
US 5,633,320 · App. 08/612,876
Thermoplastic polyester resin composition
Inventors:
Yasuo Tanaka, Yohji Hayakawa
Patented Case
View Patent ↗
Granted: May 27, 1997
Filed: May 7, 1996
Inventors
Yasuo Tanaka
Yohji Hayakawa
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.