Granted Patent
Utility
US 5,220,081 · App. 07/904,480
Process for preventing consolidation of p-dichlorobenzene
Inventors:
Ryuichi Mita, Nobuo Shimuta, deceased, Mamoru Ueda, Yosiro Nagatake, Toyohiro Tajiri
Patented Case
View Patent ↗
Granted: Jun 15, 1993
Filed: Jun 25, 1992
Inventors
Ryuichi Mita
Nobuo Shimuta, deceased
Mamoru Ueda
Yosiro Nagatake
Toyohiro Tajiri
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.