Granted Patent
Utility
US 6,133,486 · App. 09/222,980
Phenol recovery from BPA process waste streams
Inventors:
Christianus Johannes Jacobus Maas, Martin Herke Oyevaar, Jos H. M. Graff
Patented Case
View Patent ↗
Granted: Oct 17, 2000
Filed: Dec 30, 1998
Inventors
Christianus Johannes Jacobus Maas
Martin Herke Oyevaar
Jos H. M. Graff
Assignee (at issue)
General Electric Company
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.