Granted Patent
Utility
US 6,740,692 · App. 10/146,853
Solvent free coating compositions for soiling-resist ant facades
Inventors:
Hans-Peter Weitzel, Harald Zeh
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: May 16, 2002
Inventors
Hans-Peter Weitzel
Harald Zeh
Assignee (at issue)
WACKER POLYMER SYSTEMS GMBH & CO. KG
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.