Granted Patent
Utility
US 5,902,682 · App. 08/586,597
Coated sodium percarbonate particles, a process for their preparation and their use
Inventors:
Birgit Bertsch-Frank, Martin Bewersdorf, Claas-Juergen Klasen, Thomas Lieser, Klaus Mueller, Juergen Rollmann
Patented Case
View Patent ↗
Granted: May 11, 1999
Filed: Jan 16, 1996
Inventors
Birgit Bertsch-Frank
Martin Bewersdorf
Claas-Juergen Klasen
Thomas Lieser
Klaus Mueller
Juergen Rollmann
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.