Granted Patent
Utility
US 5,607,547 · App. 08/445,318
Method for reduced sulfur dioxide formation in refiner bleaching
Inventors:
Jeffrey L. Nye, Martin G. Fairbank
Patented Case
View Patent ↗
Granted: Mar 4, 1997
Filed: May 19, 1995
Inventors
Jeffrey L. Nye
Martin G. Fairbank
Assignee (at issue)
Hoechst Celanese Corporation
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.