Granted Patent
Utility
US 6,380,427 · App. 09/463,664
Process for purification of (meth)acrylic acid
Inventors:
Seiji Miyazaki, Akira Ogawa, Yasutaka Nakashima, Yoshiaki KOBAYASHI, Mikiyoshi Araki
Patented Case
View Patent ↗
Granted: Apr 30, 2002
Filed: Jan 28, 2000
Inventors
Seiji Miyazaki
Akira Ogawa
Yasutaka Nakashima
Yoshiaki KOBAYASHI
Mikiyoshi Araki
Assignee (at issue)
MITSUBISHI ELECTRIC 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.