Granted Patent
Utility
US 5,973,126 · App. 09/068,954
Azo compounds and process for producing the same
Inventors:
Ryuzo Ueno, Masaya Kitayama, Kenji Minami, Hiroyuki Wakamori
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: May 20, 1998
Inventors
Ryuzo Ueno
Masaya Kitayama
Kenji Minami
Hiroyuki Wakamori
Assignee (at issue)
Kabushiki Kaisha Ueno Seiyaku Oyo Kenkyujo
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.