Granted Patent
Utility
US 5,008,421 · App. 07/418,602
Silyl derivatives of 2,6-dimethyl-4-allyl phenol
Inventors:
George L. Brownell, Mary K. Hays, Andrew J. Sivak
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Oct 10, 1989
Inventors
George L. Brownell
Mary K. Hays
Andrew J. Sivak
Assignee (at issue)
Aristech Chemical Company
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.