Granted Patent
Utility
US 5,340,841 · App. 08/166,827
Production method of foamed particles of polyolefin resin
Inventors:
Hisao Tokoro, Satoru Shioya, Akira Hinokawa
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Dec 15, 1993
Inventors
Hisao Tokoro
Satoru Shioya
Akira Hinokawa
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.