Sigrid Breitholtz, US1388019A

On August 16, 1921, Sigrid Breitholtz of Finland obtained a U.S. patent for a pastry composition that produced an unusually crisp pie crust. Her method used a small amount of tea infusion — or another mild tannin solution—mixed with flour and fat to strengthen the dough and preserve its texture.

Date of Application: 12 June 1920

Date of Issuance: 16 August 1921

For more information, please refer to the following webpage:

• Espacenet