Approximate date. A portion of her state financed the Gihon Foundation which established the Council on Ideas, a think tank with a retreat center located north of Santa Fe, New Mexico, active from 1990 to 2000 and devoted to exploring world problems.

Bette Nesmith Graham died on May 12, 1980, due to complications of a stroke. She left her fortune to her son, who took over her foundations.

Bette Graham opted to sell the Liquid Paper company to Gillette Corporation for over $47.5 million.

In 1975, Bette Graham moved operations into a 35,000-sq. ft. international Liquid Paper headquarters building in Dallas.

By 1967, Bette Graham's company had its own corporate headquarters and automated production plant, and sales were in excess of one million units per year.

Bette Graham renamed her refined product "Liquid Paper" and applied for a patent and a trademark that same year.

Bette Graham developed the first prototype of "Liquid Paper" in 1956. She sold her first batch of "Mistake Out" in 1956 and soon she was working full-time to produce and bottle it from her North Dallas home.

D-Day, also known as the Normandy landings, was a crucial turning point in World War II. It might be the reason why Warren Nesmith, Bette's first husband, returned from serving in the military and divorced Bette.

Approximate date of development of the first fully functional modern typewriter, the IBM Model 1, that would eventually led to the need of correction fluid.

Bette Clair McMurray (later known as Bette Nesmith Graham) was born in Dallas, Texas, U.S. She is known for inventing Liquid Paper, a correction fluid.