John Langdon Woolsey, 62, a research chemist for the International Fabricare Institute in Silver Spring and a member of the board of directors of For Love of Children Inc., a Washington foster home organization, died of a heart attack Friday at Washington Adventist Hospital.

Mr. Woolsey joined the Institute's research and development division in 1970.Earlier, he had worked for the National Institute of Drycleaning in Silver Spring and for the Coled Division of the Pennwalt Corp. in Laurel.

Before moving to this area 19 years ago, he was a research chemist with ALCOA's Aluminum Research Laboratory in East St. Louis, Ill., and the Union Starch and Refining Co. in Granite City, Ill.

A native of Galesburg, Ill., Mr. Woolsey earned a bachelor's degree from Southwestern at Memphis, a master's degree in chemistry from the University of Illinois and a certificate of engineering from Washington University in St. Louis.

In World War II, he served as a surgical technician in the China-Burma-India Theater.

Besides serving on the board of directors of For Love of Children, Mr. Woolsey also was a member of the organization's Learning Center Support Group.

He lived in Silver Spring and was a member of the choir at Good Shepherd United Methodist Church there.

Survivors include his wife, Susan F., of Silver Spring; a son, David A., of Kent Cliffs, N.Y.; a daughter, Annette B. Shiflett of Lyman, Wash.; a brother, Donald C., of Galesburg; a sister Mary W. Thomson of Little Rock, Ark., and a granddaughter.

The family suggests that expressions of sympathy be in the form of contributions in his name to For Love of Children Inc. in Washington.