Patents by Inventor Jacob Drijftholt

Jacob Drijftholt 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).

  • Apparatus for refining oils or fats
    Patent number: 4962698
    Abstract: Method and apparatus for refining oil which in heated condition is used in the production of consumable products such as French fried potatoes by feeding the oil immediately after starting the baking process through a filter system within the time within which free fat acids or fat acid oxydation products could be formed.
    Type: Grant
    Filed: December 26, 1989
    Date of Patent: October 16, 1990
    Inventors: Jacob Drijftholt, Johannes C. M. van den Berg
  • Method for refining oils or fats
    Patent number: 4957758
    Abstract: A method is disclosed for refining oil which in heated condition is used in the production of consumable products such as French fried potatoes. The oil is fed through a filter system immediately after starting the frying process and within the time within which free fatty acids or fatty acid oxidation products could be formed.
    Type: Grant
    Filed: July 22, 1988
    Date of Patent: September 18, 1990
    Inventors: Jacob Drijftholt, Johannes C. M. van den Berg