Granted Patent
Utility
US 6,048,660 · App. 09/014,555
Non-volatile phenylglyoxalic esters
Inventors:
David G. Leppard, Manfred Kohler
Patented Case
View Patent ↗
Granted: Apr 11, 2000
Filed: Jan 28, 1998
Inventors
David G. Leppard
Manfred Kohler
Assignee (at issue)
Ciba Specialty Chemicals 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.