Granted Patent
Utility
US 5,139,953 · App. 07/569,422
Rotary column reactor
Inventors:
Yoshikiko Honda, Morimasa Tanimoto, Kaoru Sato, Shunichi Dosako
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Aug 20, 1990
Inventors
Yoshikiko Honda
Morimasa Tanimoto
Kaoru Sato
Shunichi Dosako
Assignee (at issue)
SNOW BRAND MILK PRODUCTS CO., 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.