Granted Patent
Utility
US 4,450,293 · App. 06/449,300
Preparation of .alpha.-hydroxyisobutyric acid using a thallic halide catalyst
Inventors:
John A. Sofranko, John J. Leonard
Patented Case
View Patent ↗
Granted: May 22, 1984
Filed: Dec 13, 1982
Inventors
John A. Sofranko
John J. Leonard
Assignee (at issue)
Atlantic Richfield 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.