Granted Patent
Utility
US 5,670,551 · App. 08/501,063
Crosslinked foamed body and a process for its production
Inventors:
Muneyuki Matsumoto, Keiji Okada, Yoshihisa Matsuo, Akemi Uchimi
Patented Case
View Patent ↗
Granted: Sep 23, 1997
Filed: Aug 11, 1995
Inventors
Muneyuki Matsumoto
Keiji Okada
Yoshihisa Matsuo
Akemi Uchimi
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.