Granted Patent
Utility
US 6,569,533 · App. 09/619,639
Gas barrier polyurethane resin
Inventors:
Takashi Uchida, Tsutomu Tawa, Hiroyuki Shiraki
Patented Case
View Patent ↗
Granted: May 27, 2003
Filed: Jul 19, 2000
Inventors
Takashi Uchida
Tsutomu Tawa
Hiroyuki Shiraki
Assignee (at issue)
Mitsui Takeda Chemicals, Inc.
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.