Granted Patent
Utility
US 4,390,585 · App. 06/375,339
Durable flexible membrane and method of making same
Inventor:
Durrell W. Holden
Patented Case
View Patent ↗
Granted: Jun 28, 1983
Filed: May 5, 1982
Inventor
Durrell W. Holden
Assignee (at issue)
Bond Cote of Virginia, 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.