Granted Patent
Utility
US 4,526,656 · App. 06/536,388
Monomeric vinyl chloride stripping tower
Inventors:
Hiroshi Okada, Hideyuki Itagaki, Takehiko Kano, Seiichi Masuko
Patented Case
View Patent ↗
Granted: Jul 2, 1985
Filed: Sep 27, 1983
Inventors
Hiroshi Okada
Hideyuki Itagaki
Takehiko Kano
Seiichi Masuko
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.