Granted Patent
Utility
US 4,590,027 · App. 06/611,380
Method of producing a thermoplastics material
Inventors:
David J. Murphy, Leslie N. Phillips
Patented Case
View Patent ↗
Granted: May 20, 1986
Filed: May 17, 1984
Inventors
David J. Murphy
Leslie N. Phillips
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.