Granted Patent
Utility
US 6,833,397 · App. 09/947,368
Method for producing a flame retardant polycarbonate resin composition
Inventors:
Akira Miyamoto, Kazuhiro Shibuya, Hiroshi Hachiya, Chung Neng Wu, Wen-Yi Su
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Sep 7, 2001
Inventors
Akira Miyamoto
Kazuhiro Shibuya
Hiroshi Hachiya
Chung Neng Wu
Wen-Yi Su
Assignee (at issue)
ASAHI KASEI CHEMICALS 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.