Issued Patents All Time
Showing 1–16 of 16 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12258541 | Crumbly phase composition of methylglycine N,N diacetic acid | Elwin Schomaker, Paulus Johannes Cornelis Van Haeren, Marco Ypma, Stijn Richard Gerard Oudenhoven, Roy Gérard Doppen | 2025-03-25 |
| 10836709 | Process to prepare a solid composition of an amino acid diacetic acid | Paulus Johannes Cornelis Van Haeren, Roy Gérard Doppen, Elwin Schomaker, Raymond Jean Cécile Vaessen, Marco Ypma +1 more | 2020-11-17 |
| 10829719 | Sodium methyl glycine-N,N-diacetic acid compound, process to prepare it and use thereof | Elwin Schomaker, Paulus Johannes Cornelis Van Haeren, Roy Gérard Doppen | 2020-11-10 |
| 10590064 | Crystals of alanine N-acetic acid precursors, process to prepare them and their use | Albertus Jacobus Maria Bouwman, Hubertus Johannes Jongen, Roy Gérard Doppen, Elwin Schomaker | 2020-03-17 |
| 9815773 | Crystalline particles of glutamic acid N,N-diacetic acid | Cornelis Elizabeth Johannus Van Lare, Roy Gérard Doppen, Elwin Schomaker, Paul Verwer | 2017-11-14 |
| 9745250 | Process to crystallize chelating agents | Elwin Schomaker, Paulus Johannes Cornelis Van Haeren | 2017-08-29 |
| 9738594 | Crystalline particles of salts of glutamic acid N,N-diacetic acid | Roy Gérard Doppen, Cornelis Elizabeth Johannus Van Lare | 2017-08-22 |
| 9416095 | Salts, crystals, complexes, and derivatives of threonine diacetic acid, a process to prepare threonine diacetic acid, and the use thereof | Axel Carstens, Tjerk Oedse Boonstra, Alexey Borisovich ZAITSEV, Wouter Jan Veenis | 2016-08-16 |
| 9334232 | Process to prepare a chelating agent or precursor thereof using a cyanide salt | Hans Lammers, Tjerk Oedse Boonstra, Adrianus Maria Reichwein | 2016-05-10 |
| 9080133 | Glutamic acid N,N-diacetic amide, glutamic acid N-acetic amide N-acetonitrile, alkali metal salts thereof, process to prepare them and their use | Tjerk Oedse Boonstra, Axel Carstens, Jim Lepage | 2015-07-14 |
| 8551312 | Process to prepare amino acid-N, N-diacetic acid compounds | Hans Lammers, Arie Volmer | 2013-10-08 |
| 8399705 | Alkali metal salt of glutamic acid N,N-diacetic acid, a process to prepare such salt, and the use thereof | Tjerk Oedse Boonstra | 2013-03-19 |
| 7211682 | Aqueous solution of a sodium salt of HEDTA | Hans Lammers, Jim Lepage | 2007-05-01 |
| 6627580 | Chelating agents and their manganic chelates | Christer L. Hakanson | 2003-09-30 |
| 6492549 | Process for preparing alkylene diamine triacetic acid | Marcellinus Alexander Van Doorn, Johannes Wilhelmus Driessen, Tjerk Oedse Boonstra | 2002-12-10 |
| 6458980 | Chelating agents and their manganic chelates | Christer L. Hakanson | 2002-10-01 |