Granted Patent
Utility
US 4,885,887 · App. 07/359,825
Apparatus and method for securing an outer roofing membrane to an insulated roof deck
Inventors:
Robert W. Simmons, Richard W. Stamper, Thomas P. Kaufman
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Jun 1, 1989
Inventors
Robert W. Simmons
Richard W. Stamper
Thomas P. Kaufman
Assignee (at issue)
GenCorp, Inc.
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.