Granted Patent
Utility
US 6,475,632 · App. 09/646,236
Dispersions for producing paint for concrete roof tiles, paint for concrete roof tiles and concrete roof tiles coated with such paint
Inventors:
Stephan Krieger, Klaus Zimmerschied, Erhard Lupprich
Patented Case
View Patent ↗
Granted: Nov 5, 2002
Filed: Sep 11, 2000
Inventors
Stephan Krieger
Klaus Zimmerschied
Erhard Lupprich
Assignee (at issue)
Clariant Corporation
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.