Granted Patent
Utility
US 6,309,739 · App. 09/135,022
Methacrylic acid ester resin composition and film made thereof
Inventors:
Keishi Koizumi, Shigemi Matsumoto, Takao Okimi, Juuichi Nishimura
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Aug 17, 1998
Inventors
Keishi Koizumi
Shigemi Matsumoto
Takao Okimi
Juuichi Nishimura
Assignee (at issue)
KANEKA 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.