Granted Patent
Utility
US 6,797,670 · App. 09/975,787
Microcapsules having polyurea walls
Inventors:
Martin Kleban, Gunter Klug, Jurgen Weisser
Patented Case
View Patent ↗
Granted: Sep 28, 2004
Filed: Oct 11, 2001
Inventors
Martin Kleban
Gunter Klug
Jurgen Weisser
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.