Granted Patent
Utility
US 4,413,092 · App. 06/351,792
Vinyl halide polymer blends of enhanced impact resistance
Inventor:
Gilbert Witschard
Patented Case
View Patent ↗
Granted: Nov 1, 1983
Filed: Feb 24, 1982
Inventor
Gilbert Witschard
Assignee (at issue)
Occidental Chemical 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.