Granted Patent
Utility
US 4,960,875 · App. 07/390,504
External agent for the skin comprising a specific ethylenic copolymer
Inventors:
Tatsuo Kinoshita, Shuji Minami, Shigeru Kanzaki
Patented Case
View Patent ↗
Granted: Oct 2, 1990
Filed: Aug 1, 1989
Inventors
Tatsuo Kinoshita
Shuji Minami
Shigeru Kanzaki
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.