Patents by Inventor Willem J. Bel

Willem J. Bel has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process of preparing a tea product
    Patent number: 5258188
    Abstract: In a process of preparing a tea extract, the extract is adjusted to 20.degree.-80.degree. C., treated with tannase at pH=4-7 and then subjected to ultrafiltration at 2.degree.-90.degree. C. using a membrane with an average molecular weight exclusion point of at least 5000 Daltons (preferably at least 30,000 Daltons). The extract may finally be subjected to an additional filtration, preferably microfiltration. Also an instant a cold-water soluble tea powder or granulate is claimed.
    Type: Grant
    Filed: March 10, 1993
    Date of Patent: November 2, 1993
    Assignee: Thomas J. Lipton Co., Division of Conopco, Inc.
    Inventors: Bart Barmentlo, Willem J. Bel, Bruin Hoogstad, Sidney Pendlington, Nigel K. Slater