Granted Patent
Utility
US 4,610,902 · App. 06/774,514
Roofing membranes and system
Inventors:
Robert J. Eastman, Henry S. Goodspeed
Patented Case
View Patent ↗
Granted: Sep 9, 1986
Filed: Sep 10, 1985
Inventors
Robert J. Eastman
Henry S. Goodspeed
Assignee (at issue)
Manville Service 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.