Frank J. Loprest, Ph.D., 90, of Macungie, formerly of Holland, Bucks County, died April 2, 2019, in his home surrounded by his loving family. He was the husband of Jane A. (Stables) Loprest to whom he was married 59 years. Born in New York City, N.Y., he was the son of the late John and Josephine (Lizzitano) Loprest.

He faithfully and honorably served his country in the U.S. Army National Guard.

He was a graduate of New York University earning a doctorate in physical chemistry. He held 30 patents and devoted his life to researching chemical applications in the fields of atomic chemistry, rocket fuel and consumer products.

He was a member of St. Joseph the Worker Roman Catholic Church, Orefield and a former member of St. Bede the Venerable Roman Catholic Church, Holland, where he served as Eucharistic minister and lector.

He is survived by his wife; children, The Honorable F. James Jr. and his wife, Theresa Moser, Esq., of Brooklyn, N.Y., Dr. Lorraine J. and her husband, Dr. Louis E. Spikol, of Allentown; Pamela J., Ph.D. and her husband, Hugh G. Courtney, Ph.D., of Concord, Mass., Amy M., Esq., of Brooklyn, N.Y., Elizabeth A. and her husband, Wilbur E. Henry, of Millburn, N.J.; sister-in-law, Gloria, of Brooklyn, N.Y.; nine grandchildren.

Memorial contributions may be made to Catholic Charities, USA and/or U.S. Holocaust Museum c/o the funeral home, P.O. Box #196, Schnecksville, 18078-0196.

Arrangements were made by the Heintzelman Funeral Home, Inc., Schnecksville.