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Patent applications and USPTO patent grants for Wilhelm; Volker.The latest application filed is for "microspheres".
Patent | Date |
---|---|
Microspheres Grant 10,689,505 - Quittmann , et al. | 2020-06-23 |
Microspheres App 20170152372 - QUITTMANN; Ulrich ;   et al. | 2017-06-01 |
Microspheres App 20160145421 - WILHELM; Volker ;   et al. | 2016-05-26 |
Effect pigments Grant 8,647,429 - Melson , et al. February 11, 2 | 2014-02-11 |
Pigment preparations Grant 8,613,800 - Wilhelm , et al. December 24, 2 | 2013-12-24 |
Effect Pigments App 20120308667 - Melson; Sabine ;   et al. | 2012-12-06 |
Pigment Preparations App 20110088595 - Wilhelm; Volker ;   et al. | 2011-04-21 |
Process for the preparation of pigments containing Cr.sub.2 O.sub.3 Grant 5,167,708 - Wilhelm , et al. December 1, 1 | 1992-12-01 |
Thermostable zinc ferrite color pigments containing 0.05-0.5 wt % lithium, a process for their preparation and their use Grant 4,985,078 - Rademachers , et al. January 15, 1 | 1991-01-15 |
Process for the production of rutile mixed-phase pigments Grant 4,919,726 - Rademachers , et al. April 24, 1 | 1990-04-24 |
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