Granted Patent
Utility
US 6,524,709 · App. 09/688,033
Epoxy resin compositions containing phosphorus, flame retardant resin sheet using said epoxy resin containing phosphorus, resin clad metal foil, prepreg and laminated board, multi layer board
Inventors:
Takashi Sagara, Toshiharu Takata, Kiyoaki Ihara, Hidetaka Kakiuchi, Kazuo Ishihara, Chiaki Asano, Masao Gunji, Hiroshi Sato
Patented Case
View Patent ↗
Granted: Feb 25, 2003
Filed: Oct 12, 2000
Inventors
Takashi Sagara
Toshiharu Takata
Kiyoaki Ihara
Hidetaka Kakiuchi
Kazuo Ishihara
Chiaki Asano
Masao Gunji
Hiroshi Sato
Assignees (at issue)
Matsushita Electric Works, Ltd.
TOHTO KASEI CO., LTD.
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.