Granted Patent
Utility
US 6,005,147 · App. 08/938,822
Method of producing 3, 5, 5-trimethylcyclohexa-3-ene-1-one(.beta.-isophorone) by the isomerization of 3, 5, 5-trimethylcyclohexa-2-ene-1-(.alpha.-isophorone)
Inventors:
Steffen Krill, Gunes Giray, Klaus Huthmacher, Frank Hubner, Herbert Tanner
Patented Case
View Patent ↗
Granted: Dec 21, 1999
Filed: Sep 26, 1997
Inventors
Steffen Krill
Gunes Giray
Klaus Huthmacher
Frank Hubner
Herbert Tanner
Assignee (at issue)
Degussa AG
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.