Granted Patent
Utility
US 4,250,129 · App. 05/886,160
Method for the continuous formation of biaxially oriented thermoplastic materials and forming articles therefrom in a continuous process
Inventor:
Thomas W. Winstead
Patented Case
View Patent ↗
Granted: Feb 10, 1981
Filed: Mar 13, 1978
Inventor
Thomas W. Winstead
Assignee (at issue)
Maryland Cup 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.