Patents by Inventor Bruin Hoogstad

Bruin Hoogstad 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).

  • Patent number: 5258188
    Abstract: In a process of preparing a tea extract, the extract is adjusted to C., treated with tannase at pH=4-7 and then subjected to ultrafiltration at 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
  • Patent number: 5198259
    Abstract: The present invention relates to a process for the preparation of a concentrated tea extract comprising the steps of:(a) extracting tea-leaves with water having a temperature between and C. and separating the first extract from the tea-leaves;(b) extracting tea-leaves which have previously been extracted with water between and C. for a second time, with water having a temperature of more than C. and separating the second extract from the tea-leaves;(c) concentrating said first extract to obtain a first concentrate;(d) concentrating said second extract to obtain a second concentrate; and(e) combining said first and second concentrate,wherein said first extract is concentrated by subjecting it to reverse osmosis at a temperature between and C. and said second extract is concentrated between and C.
    Type: Grant
    Filed: February 16, 1989
    Date of Patent: March 30, 1993
    Assignee: Thomas J. Lipton, Inc.
    Inventor: Bruin Hoogstad