Granted Patent
Utility
US 4,309,564 · App. 06/199,719
Methods for preparing eutectic mixtures of p-hydroxybenzoic acid esters
Inventors:
Donald F. Loncrini, John J. Taylor
Patented Case
View Patent ↗
Granted: Jan 5, 1982
Filed: Oct 23, 1980
Inventors
Donald F. Loncrini
John J. Taylor
Assignee (at issue)
MALLINCKRODT LLC
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.