Inventor

Warren D. Ketola

Patents indexed

Year range

1979

Associated with

Minnesota Mining and Manufacturing Co

Years active

1979

Total patents

Most recent

1979

Frequent collaborator

William A. Baker

Domains

materials-scienceadhesivesoffice-suppliesconsumer-goodspolymer-chemistry

Activity by decade

1970s

Patents

US 4166152·1979·Minnesota Mining and Manufacturing Co

The Post-it Note Adhesive — Invented as a Failure That Stuck Around

Spencer Silver's 3M patent describes the microsphere adhesive that makes Post-it Notes work — an adhesive so weak it was considered a failed experiment until a colleague realized it was perfect for removable notes.