1923
Dr. Kritchevsky is born in Chicago, Illinois to Stephen Sholtes and Anna Sophia Sholtes.
1946
Dr. Kritchevsky receives a Master of Science from Northwestern University.
1946
Dr. Kritchevsky becomes a research chemist at the Argonne National Laboratory in Chicago, Illinois.
1950
Dr. Kritchevsky becomes a research chemist at Tracerlab, Inc. in Berkeley, California.
1952
Dr. Kritchevsky becomes an assistant professor in chemistry from Upsala College in East Orange, New Jersey.
1965
Dr. Kritchevsky becomes a lecturer in chemistry at Rosemont College in Lower Merion Township, Pennsylvania.
1971
Dr. Kritchevsky becomes a full professor in chemistry at Spring Garden College in Philadelphia, Pennsylvania.
1974
Dr. Kritchevsky is named an Outstanding Teacher by Spring Garden College.
1978
Dr. Kritchevsky receives a Doctor of Philosophy from the University of Pennsylvania.
1987
Dr. Kritchevsky is appointed president of Alphatech, Inc.