Simplify the following text for a Grade 10 native English-speaking person.
Original: NestlÃ 's flagship powdered coffee product was introduced in Switzerland on April 1 , 1938 after being developed for seven years by Max Morgenthaler and Vernon Chapman .
Simplified: NestlÃ 's instant coffee product was introduced in Switzerland on April 1 , 1938 after being developed for seven years by Max Morgenthaler and Vernon Chapman .