Granted Patent
Utility
US 4,599,457 · App. 06/714,149
Process of preparing hydroxyarylaldehydes
Inventors:
Phillip L. Mattison, Leroy O. Krbechek
Patented Case
View Patent ↗
Granted: Jul 8, 1986
Filed: Mar 20, 1985
Inventors
Phillip L. Mattison
Leroy O. Krbechek
Assignee (at issue)
Henkel Limited
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.