Granted Patent
Utility
US 4,059,652 · App. 05/677,105
Extraction resistant polyolefin stabilizer
Inventors:
John L. H. Allan, John J. Roderick
Patented Case
View Patent ↗
Granted: Nov 22, 1977
Filed: Apr 15, 1976
Inventors
John L. H. Allan
John J. Roderick
Assignee (at issue)
Dart Industries 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.