Granted Patent
Utility
US 4,670,590 · App. 06/850,605
Preparation process of acrylamide crystals
Inventors:
Yoshihiko Kambara, Shiro Asano, Wataru Isozaki, Syoji Kitado, Masao Yamaguchi
Patented Case
View Patent ↗
Granted: Jun 2, 1987
Filed: Apr 11, 1986
Inventors
Yoshihiko Kambara
Shiro Asano
Wataru Isozaki
Syoji Kitado
Masao Yamaguchi
Assignee (at issue)
Mitsui Toatsu Chemicals, Incorporated
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.