Granted Patent
Utility
US 4,579,979 · App. 06/694,371
Method for preparation of acetals
Inventors:
Juan Andrade, Dietrich Arntz, Michael Kraft, Gunter Prescher
Patented Case
View Patent ↗
Granted: Apr 1, 1986
Filed: Jan 24, 1985
Inventors
Juan Andrade
Dietrich Arntz
Michael Kraft
Gunter Prescher
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.