Granted Patent
Utility
US 5,391,581 · App. 08/168,214
Production method of foamed particles of uncrosslinked ethylene-based resin
Inventors:
Hideki Kuwabara, Kazuo Tsurugai, Masaharu Oikawa, Hidehiro Sasaki, Satoru Shioya
Patented Case
View Patent ↗
Granted: Feb 21, 1995
Filed: Dec 17, 1993
Inventors
Hideki Kuwabara
Kazuo Tsurugai
Masaharu Oikawa
Hidehiro Sasaki
Satoru Shioya
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.