Granted Patent
Utility
US 6,492,015 · App. 09/671,749
Composite sheet having foamed polycarbonate resin layer and non-foamed polycarbonate resin layer
Inventors:
Takeshi Aoki, Yoshihisa Ishihara, Satoshi Iwasaki, Seiji Takahashi, Yoshiaki Momose
Patented Case
View Patent ↗
Granted: Dec 10, 2002
Filed: Sep 28, 2000
Inventors
Takeshi Aoki
Yoshihisa Ishihara
Satoshi Iwasaki
Seiji Takahashi
Yoshiaki Momose
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.