Granted Patent
Utility
US 6,172,254 · App. 09/345,538
Catalyst composition and method for producing diaryl carbonates using nitrile as promoter
Inventors:
Eric James Pressman, Grigorii Lev Soloveichik, Bruce Fletcher Johnson, Kirill Vladimirovich Shalyaev
Patented Case
View Patent ↗
Granted: Jan 9, 2001
Filed: Jun 30, 1999
Inventors
Eric James Pressman
Grigorii Lev Soloveichik
Bruce Fletcher Johnson
Kirill Vladimirovich Shalyaev
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.