Patents by Inventor Tjeerd Jongsma

Tjeerd Jongsma 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).

  • Spiral wound filter assembly
    Patent number: 8940167
    Abstract: The invention relates to a filter assembly for membrane filtration—of liquids, and more in particular a spiral wound filter assembly with improved filtration performance. Provided is a spiral wound filter assembly comprising a permeate channel (5; 305, 325) for transporting permeate to the permeate outlet (12), said permeate channel being provided with at least one flow restriction (13; 113, 120; 213; 333) in form of check or control valves or ridges, for increasing the pressure in at least part of the permeate channel. The invention further relates to an apparatus comprising such a filter assembly, and to methods for using this apparatus.
    Type: Grant
    Filed: June 30, 2008
    Date of Patent: January 27, 2015
    Assignee: Friesland Brands B.V.
    Inventors: Albert van der Padt, Tjeerd Jongsma
  • SPIRAL WOUND FILTER ASSEMBLY
    Publication number: 20100326910
    Abstract: The invention relates to a filter assembly for membrane filtration—of liquids, and more in particular a spiral wound filter assembly with improved filtration performance. Provided is a spiral wound filter assembly comprising a permeate channel (5; 305, 325) for transporting permeate to the permeate outlet (12), said permeate channel being provided with at least one flow restriction (13; 113, 120; 213; 333) in form of check or control valves or ridges, for increasing the pressure in at least part of the permeate channel. The invention further relates to an apparatus comprising such a filter assembly, and to methods for using this apparatus.
    Type: Application
    Filed: June 30, 2008
    Publication date: December 30, 2010
    Inventors: Albert van der Padt, Tjeerd Jongsma
  • Process for concentrating fruit and vegetable juices, and concentrates thereby obtained
    Patent number: 7815961
    Abstract: The invention relates to a process for concentrating vegetable juice or fruit juice, wherein a permeate stream and a retentate stream are formed by subjecting the juice to an ultrafiltration step and subjecting the permeate stream to evaporative concentration. Further, the invention relates to the use of the thus obtainable concentrated juice for preparing a vegetable or fruit juice by diluting the concentrate with water.
    Type: Grant
    Filed: June 11, 2004
    Date of Patent: October 19, 2010
    Assignee: Friesland Brands B.V.
    Inventors: Gerrit Marten Westhoff, Tjeerd Jongsma, Piet Haasen, Mathijs Hendrikus J. Martens
  • Device with a Membrane on a Carrier, as Well as a Method for Manufacturing Such a Membrane
    Publication number: 20080248182
    Abstract: A membrane on a carrier for filtration of liquids includes a carrier and a membrane. Also described is a method for manufacturing a membrane on a carrier as disclosed. Additionally described is the application of a membrane on a carrier as well as to a module including such a membrane. Also described is a method for determining fracture in such a membrane on a carrier.
    Type: Application
    Filed: April 29, 2005
    Publication date: October 9, 2008
    Inventors: Tjeerd Jongsma, Roelof Bos, Wietze Nijdam, Cornelis Johanness Maria Van Rijn
  • Process for concentrating fruit and vegetable juices, and concentrates thereby obtained
    Publication number: 20050276899
    Abstract: The invention relates to a process for concentrating vegetable juice or fruit juice, wherein a permeate stream and a retentate stream are formed by subjecting the juice to an ultrafiltration step and subjecting the permeate stream to evaporative concentration. Further, the invention relates to the use of the thus obtainable concentrated juice for preparing a vegetable or fruit juice by diluting the concentrate with water.
    Type: Application
    Filed: June 11, 2004
    Publication date: December 15, 2005
    Inventors: Gerrit Westhoff, Tjeerd Jongsma, Piet Haasen, Mathijs Martens
  • Encapsulated material with controlled release
    Patent number: 6290988
    Abstract: An encapsulated material is described of which at least a part of the material is kept encapsulated during heat treatment in an aqueous environment and is released during cooling after a heat treatment. The material is encapsulated in a layer of a hydrophobic film-forming material and a layer of a material having a low critical solution temperature (LCST) below the treatment temperature. The layer containing the hydrophobic material may be situated inside the layer having the LCST and have a melting point below the LCST, but it may also be situated outside the layer having the LCST and have a melting point above the LCST of said layer. Said layers may also be applied together.
    Type: Grant
    Filed: January 6, 2000
    Date of Patent: September 18, 2001
    Assignee: Instituut Voor Agrotechnologisch Onderzoek (ATO-DLO)
    Inventors: Geertruida Everdina Theodora Van Vilsteren, Hendrik Jan Neerhof, Eugenius Paulus Henricus Maria Schijvens, Didier André Pierre Delnoye, Tjeerd Jongsma