Some articles on greiter:

Sunscreen - History
... The first effective sunscreen may have been developed by chemist Franz Greiter in 1946 ... Piz Buin (named in honor of the place Greiter allegedly obtained the sunburn that inspired his concoction), which is still today a marketer of sunscreen products ... Franz Greiter is credited with introducing the concept of sun protection factor (SPF) in 1962, which has become a worldwide standard for measuring the ...