Even after selling the rights to her diaper cover, Donovan remained an active inventor. She developed numerous other products, including dental floss dispenser and a space-saving closet organizer.

After several years of marriage, Marion Donovan and James F. Donovan divorced. Details regarding the reasons for the divorce are limited in publicly available sources.

Marion Donovan married John F. Butler. This marked a new chapter in her personal life, and they remained married until his death in 1974.

Donovan invented the 'Big Hang-Up,' a space-saving closet organizer. This invention demonstrated her ongoing commitment to solving everyday problems through innovative design.

At the age of 61, Donovan enrolled at Yale University to study architecture, showcasing her intellectual curiosity and desire to expand her knowledge base. She earned her Bachelor of Architecture degree from Yale in 1981. This illustrates her lifelong learning approach.