Granted Patent
Utility
US 4,276,047 · App. 06/141,375
Anthraquinone reactive dyes for cellulose-containing fibers
Inventors:
Seiichi Imahori, Toshio Hihara, Tomio Yomeyama, Takao Hirota
Patented Case
View Patent ↗
Granted: Jun 30, 1981
Filed: Apr 18, 1980
Inventors
Seiichi Imahori
Toshio Hihara
Tomio Yomeyama
Takao Hirota
Assignee (at issue)
Mitsubishi Chemical Industries, 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.