Granted Patent
Utility
US 6,534,686 · App. 09/954,914
Method for producing bisphenol catalysts and bisphenols
Inventors:
Jimmy Lynn Webb, James Spivack
Patented Case
View Patent ↗
Granted: Mar 18, 2003
Filed: Sep 18, 2001
Inventors
Jimmy Lynn Webb
James Spivack
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.