Granted Patent
Utility
US 5,647,143 · App. 08/583,463
Vacuum-degreasing cleaning method
Inventors:
Ken Kubota, Kunihiko Ishikawa, Noboru Hiramoto
Patented Case
View Patent ↗
Granted: Jul 15, 1997
Filed: Jan 5, 1996
Inventors
Ken Kubota
Kunihiko Ishikawa
Noboru Hiramoto
Assignee (at issue)
Japan Hayes 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.