Granted Patent
Utility
US 4,096,303 · App. 05/648,616
Composite carpet and foam laminate and method
Inventor:
Ralph G. Doerfling
Patented Case
View Patent ↗
Granted: Jun 20, 1978
Filed: Jan 12, 1976
Inventor
Ralph G. Doerfling
Assignee (at issue)
Detroit Gasket & Manufacturing 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.