Granted Patent
Utility
US 5,340,862 · App. 08/019,322
Stabilizers for halogen containing polymers
Inventors:
Joseph Silbermann, William L. Smith
Patented Case
View Patent ↗
Granted: Aug 23, 1994
Filed: Feb 10, 1993
Inventors
Joseph Silbermann
William L. Smith
Assignee (at issue)
Elf Atochem North America, 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.