Granted Patent
Utility
US 4,339,615 · App. 06/205,182
Process for producing resorcinol
Inventors:
Ichiro Imai, Fujihisa Matsunaga, Hiroaki Nakagawa, Masayasu Isibasi, Tohru Taguchi
Patented Case
View Patent ↗
Granted: Jul 13, 1982
Filed: Nov 10, 1980
Inventors
Ichiro Imai
Fujihisa Matsunaga
Hiroaki Nakagawa
Masayasu Isibasi
Tohru Taguchi
Assignee (at issue)
Mitsui Petrochemical 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.