Granted Patent
Utility
US 4,391,948 · App. 06/392,423
Emulsion/suspension ASA graft copolymers as flow modifiers for PVC
Inventors:
John C. Falk, Mike S. D. Juang
Patented Case
View Patent ↗
Granted: Jul 5, 1983
Filed: Jun 25, 1982
Inventors
John C. Falk
Mike S. D. Juang
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.