Granted Patent
Utility
US 4,421,855 · App. 06/292,848
Production of acrylamide using immobilized cells
Inventors:
Ichiro Watanabe, Keiichi Sakashita, Yasuo Ogawa
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Aug 14, 1981
Inventors
Ichiro Watanabe
Keiichi Sakashita
Yasuo Ogawa
Assignee (at issue)
Nitto Chemical Industry 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.