Granted Patent
Utility
US 6,077,970 · App. 09/166,563
Carboxylic acid esters of 2-hydroxy-5-isoalkyl-beta-methylstyrene
Inventor:
Leroy O. Krbechek
Patented Case
View Patent ↗
Granted: Jun 20, 2000
Filed: Oct 6, 1998
Inventor
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.