Granted Patent
Utility
US 3,956,214 · App. 05/521,113
Method of preparing curable pellets of polyethylene with a motionless mixer
Inventors:
Stanley L. Tate, Bobby A. Rowland, Michael M. Blackstone
Patented Case
View Patent ↗
Granted: May 11, 1976
Filed: Nov 5, 1974
Inventors
Stanley L. Tate
Bobby A. Rowland
Michael M. Blackstone
Assignee (at issue)
Southwire Company, LLC
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.