Granted Patent
Utility
US 4,764,563 · App. 07/020,283
Clear impact modifier for PVC
Inventors:
Frank L. Meredith, Lewis E. Ferguson
Patented Case
View Patent ↗
Granted: Aug 16, 1988
Filed: Feb 27, 1987
Inventors
Frank L. Meredith
Lewis E. Ferguson
Assignee (at issue)
Borg-Warner Chemicals, Inc.
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.