Granted Patent
Utility
US 6,686,400 · App. 10/190,549
Foamed and expanded beads of polyester-based resin and foam molding obtained therefrom
Inventors:
Tomoo Tokiwa, Mitsuru Shinohara, Hidehiro Sasaki
Patented Case
View Patent ↗
Granted: Feb 3, 2004
Filed: Jul 9, 2002
Inventors
Tomoo Tokiwa
Mitsuru Shinohara
Hidehiro Sasaki
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.