Granted Patent
Utility
US 6,544,909 · App. 09/591,593
Single ply reinforced roofing membrane
Inventors:
Krishna Venkataswamy, Krishna Srinivasan, Li-Ying Yang
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Jun 9, 2000
Inventors
Krishna Venkataswamy
Krishna Srinivasan
Li-Ying Yang
Assignee (at issue)
BUILDING MATERIALS INVESTMENT 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.