Granted Patent
Utility
US 5,935,562 · App. 08/930,927
Permanent process and agent
Inventors:
Beate Dannecker, Gunther Lang, Helmut Keller, Ulrike Bohr
Patented Case
View Patent ↗
Granted: Aug 10, 1999
Filed: Oct 6, 1997
Inventors
Beate Dannecker
Gunther Lang
Helmut Keller
Ulrike Bohr
Assignee (at issue)
Wella GmbH
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.