Granted Patent
Utility
US 4,234,472 · App. 06/016,582
Smoke retardant vinyl chloride and vinylidene chloride polymer compositions
Inventor:
Elmer D. Dickens, Jr.
Patented Case
View Patent ↗
Granted: Nov 18, 1980
Filed: Mar 1, 1979
Inventor
Elmer D. Dickens, Jr.
Assignee (at issue)
B. F. Goodrich Company
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.