In 1702, letters-patent were granted to the family of Pierre Chicaneau, who were said to have improved upon the process discovered by him, and since 1693 to have made porcelain as "perfect as the Chinese".
Existen documentos de patentes que fueron otorgados a la familia Pierre Chicaneau, quien decía haber descubierto la mejora en el proceso y que desde 1693 hicieron porcelana tan «perfecta como la chinesa».