Granted Patent
Utility
US 5,958,083 · App. 09/033,537
Prevention of back-staining in stone washing
Inventors:
Masahiro Onishi, Merete Fich, Annette Hanne Toft, Martin Schulein
Patented Case
View Patent ↗
Granted: Sep 28, 1999
Filed: Mar 2, 1998
Inventors
Masahiro Onishi
Merete Fich
Annette Hanne Toft
Martin Schulein
Assignee (at issue)
Novo Nordisk A/S
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.