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Patent applications and USPTO patent grants for Erhardt; Klaus.The latest application filed is for "novel nitrification inhibitors, and the use of polyacids which contain a nitrification inhibitor for the treatment of inorganic fertilizers".
Patent | Date |
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Nitrification inhibitors, and the use of polyacids which contain a nitrification inhibitor for the treatment of inorganic fertilizers Grant 6,802,882 - Barth , et al. October 12, 2 | 2004-10-12 |
Novel nitrification inhibitors, and the use of polyacids which contain a nitrification inhibitor for the treatment of inorganic fertilizers App 20030145641 - Barth, Thomas ;   et al. | 2003-08-07 |
Diureides and their use App 20020134124 - Horchler von Locquenghien, Klaus ;   et al. | 2002-09-26 |
Granule mixtures composed of coated and non-coated fertilizer granules Grant 6,287,359 - Erhardt , et al. September 11, 2 | 2001-09-11 |
Nitrification inhibitors and the use of polyacids to treat mineral fertilizers containing a nitrification inhibitor Grant 6,139,596 - Barth , et al. October 31, 2 | 2000-10-31 |
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