Granted Patent
Utility
US 6,706,805 · App. 10/153,099
Use of copolymers of vinyl ester, (meth)acrylic ester and optionally ethylene comonomers in building materials
Inventor:
Hans-Peter Weitzel
Patented Case
View Patent ↗
Granted: Mar 16, 2004
Filed: May 22, 2002
Inventor
Hans-Peter Weitzel
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.