Frank J. Loprest, Ph.D. 90, of Macungie, formerly of Holland, Bucks County, died April 2, 2019, surrounded by his loving family in his home.

He and his wife Jane A. (Stables) Loprest were married 59 years.

Born Jan. 8, 1929, 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.

A graduate of New York University, earning his 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.

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

Expressions of sympathy may be made at heintzelmancares.com.

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

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