Granted Patent
Utility
US 4,555,583 · App. 06/597,067
Preparation process for glyoxal
Inventors:
Yoshiaki Toyoda, Kazuo Wakimura, Tadaharu Hase, Nobumasa Arashiba
Patented Case
View Patent ↗
Granted: Nov 26, 1985
Filed: Mar 28, 1984
Inventors
Yoshiaki Toyoda
Kazuo Wakimura
Tadaharu Hase
Nobumasa Arashiba
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.