Granted Patent
Utility
US 5,658,873 · App. 08/525,782
Coated sodium percarbonate particles, a process for their production and detergent, cleaning and bleaching compositions containing them
Inventors:
Birgit Bertsch-Frank, Claas-Juergen Klasen, Thomas Lieser, Klaus Mueller, Martin Bewersdorf
Patented Case
View Patent ↗
Granted: Aug 19, 1997
Filed: Oct 2, 1995
Inventors
Birgit Bertsch-Frank
Claas-Juergen Klasen
Thomas Lieser
Klaus Mueller
Martin Bewersdorf
Assignee (at issue)
Degussa AG
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.