Granted Patent
Utility
US 5,747,549 · App. 08/750,248
Foamed particles of polypropylene homopolymer and molded article of the foamed particles
Inventors:
Kazuo Tsurugai, Hisao Tokoro, Masaharu Oikawa
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Dec 5, 1996
Inventors
Kazuo Tsurugai
Hisao Tokoro
Masaharu Oikawa
Assignee (at issue)
JSP Corporation
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.