Granted Patent
Utility
US 6,710,091 · App. 09/913,990
Nanoparticulate, redispersible zinc oxide gels
Inventors:
Hermann-Jens Womelsdorf, Werner Hoheisel, Gerd Passing
Patented Case
View Patent ↗
Granted: Mar 23, 2004
Filed: Aug 21, 2001
Inventors
Hermann-Jens Womelsdorf
Werner Hoheisel
Gerd Passing
Assignee (at issue)
Bayer Aktiengesellschaft
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.