Granted Patent
Utility
US 4,542,179 · App. 06/653,631
Acrylic sequential graft copolymer-styrene-acrylonitrile copolymer blends
Inventors:
John C. Falk, Leland B. Kliever
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Sep 24, 1984
Inventors
John C. Falk
Leland B. Kliever
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.