Granted Patent
Utility
US 5,300,545 · App. 08/024,567
Process for stabilizing polymer compositions against heat or light effects
Inventors:
Robert T. Kazmierczak, Ronald E. Mac Leay
Patented Case
View Patent ↗
Granted: Apr 5, 1994
Filed: Mar 1, 1993
Inventors
Robert T. Kazmierczak
Ronald E. Mac Leay
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.