Granted Patent
Utility
US 4,310,451 · App. 06/088,120
Free flowing rigid PVC resin powder compositions
Inventors:
Gerald W. Ernest, James R. DeFife
Patented Case
View Patent ↗
Granted: Jan 12, 1982
Filed: Oct 25, 1979
Inventors
Gerald W. Ernest
James R. DeFife
Assignee (at issue)
Diamond Shamrock Plastics 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.