Granted Patent
Utility
US 4,604,483 · App. 06/699,015
Method separating phenylalanine and cinnamic acid
Inventors:
Tomohiko Kitsukawa, Hiroshi Kusano, Eiji Miyata, Toyokazu Sugawara
Patented Case
View Patent ↗
Granted: Aug 5, 1986
Filed: Feb 7, 1985
Inventors
Tomohiko Kitsukawa
Hiroshi Kusano
Eiji Miyata
Toyokazu Sugawara
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.