Granted Patent
Utility
US 4,215,160 · App. 06/005,241
Method of forming waterproofing material
Inventors:
Arnold M. Rosenberg, James M. Gaidis
Patented Case
View Patent ↗
Granted: Jul 29, 1980
Filed: Jan 22, 1979
Inventors
Arnold M. Rosenberg
James M. Gaidis
Assignee (at issue)
W. R. Grace & Co.
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.