Granted Patent
Utility
US 5,888,636 · App. 08/585,749
Multi-layer blow molded article of polypropylene
Inventors:
Tadashi Asanuma, Shigeru Kimura, Tamio Kawasumi, Shunji Ueda, Masami Hashimoto
Patented Case
View Patent ↗
Granted: Mar 30, 1999
Filed: Jan 16, 1996
Inventors
Tadashi Asanuma
Shigeru Kimura
Tamio Kawasumi
Shunji Ueda
Masami Hashimoto
Assignee (at issue)
MITSUI 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.