Granted Patent
Utility
US 5,520,896 · App. 08/272,500
Process to remove metal species from exhaust vapors
Inventors:
Aart P. de Graaf, Georg H. Lindner, Leendert Cornelis Hoekman
Patented Case
View Patent ↗
Granted: May 28, 1996
Filed: Jul 9, 1994
Inventors
Aart P. de Graaf
Georg H. Lindner
Leendert Cornelis Hoekman
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.