Lehr; Friedrich
Patent Applications and Registrations
Patent applications and USPTO patent grants for Lehr; Friedrich.The latest application filed is for "storage-stable dye solutions".
- Lehr; Friedrich - Efringen-Kirchen DE
| Patent | Date |
|---|---|
| Storage-stable dye solutions Grant 10,392,514 - Lehr A | 2019-08-27 |
| Storage-stable Dye Solutions App 20170022366 - LEHR; Friedrich | 2017-01-26 |
| Basic bisazo compounds Grant 8,921,564 - Hasemann , et al. December 30, 2 | 2014-12-30 |
| Anthraquinone Dyes As Photosensitizers In Photovoltaic Cells App 20100267957 - Lehr; Friedrich | 2010-10-21 |
| Basic Bisazo Compounds App 20100000033 - Hasemann; Ludwig ; et al. | 2010-01-07 |
| Concentrated aqueous compositions of dyestuffs Grant 7,597,721 - Lehr October 6, 2 | 2009-10-06 |
| Concentrated aqueous compositions of dyestuffs App 20070101515 - Lehr; Friedrich | 2007-05-10 |
| Basic mono- and bisazo compounds Grant 7,183,409 - Lehr , et al. February 27, 2 | 2007-02-27 |
| Use of disazo compounds Grant 6,844,428 - Hasemann , et al. January 18, 2 | 2005-01-18 |
| Basic mono-and bisazo compounds App 20040158049 - Lehr, Friedrich ; et al. | 2004-08-12 |
| Use of disazo compounds App 20040111813 - Hasemann, Ludwig ; et al. | 2004-06-17 |
| Use of organic substances App 20030182733 - Geiwiz, Jurgen ; et al. | 2003-10-02 |
| Tetrakisazo compounds having two 1-hydroxy-3- or 4-sulfo-6- or 7-amino- or substituted amino-naphthalene coupling component radicals the amino or substituted amino groups of which are linked 1,3,5-triazine rings Grant 4,670,547 - Lehr June 2, 1 | 1987-06-02 |
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