Dehnert; Johannes

Patent Applications and Registrations

Patent applications and USPTO patent grants for Dehnert; Johannes.The latest application filed is for "heterocyclic azo dyes containing cyanothiophene derivatives as diazo components and diaminopyridines as coupling components".

Company Profile

0.15.0

Dehnert; Johannes - Ludwigshafen DE

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Heterocyclic azo dyes containing cyanothiophene derivatives as diazo components and diaminopyridines as coupling components Grant 4,855,413 - Dehnert , et al. August 8, 1	1989-08-08
Diaminopyridine azo dyes having acyloxy radicals substituted on the diaminopyridine Grant 4,855,412 - Dehnert , et al. August 8, 1	1989-08-08
Disazo dyestuffs having an acylamino group and an aromatic-oxy group on different terminal moieties Grant 4,344,880 - Dehnert , et al. August 17, 1	1982-08-17
Oil-soluble azo dye with N-substituted .beta.-naphthylamine as coupling component Grant 4,315,756 - Zeidler , et al. February 16, 1	1982-02-16
Uniformly dyed water-swellable cellulosic fibers Grant 4,157,893 - Dehnert , et al. June 12, 1	1979-06-12
Uniformly dyed water-swellable cellulosic fibers Grant 4,150,943 - Dehnert , et al. April 24, 1	1979-04-24
Azo dyes having a 3-cyano- or 3-carbamoyl-2,6-diamino-pyridine coupling component Grant 4,146,535 - Dehnert , et al. March 27, 1	1979-03-27
Azo dyes with 2,6-diamino-pyridine coupling component Grant 4,128,545 - Dehnert , et al. December 5, 1	1978-12-05
Certain substituted 2,6-diamino-4-methyl-nicotinitriles the corresponding nicotinamides and derivatives thereof Grant RE29,640 - Lamm , et al. May 23, 1	1978-05-23
Azo dyes having 2,6-diaminopyridine derivatives as coupling components Grant 4,042,578 - Dehnert , et al. * August 16, 1	1977-08-16
Azo dye with a 2,6-diamino-5-cyano-or-5-carbamoyl-pyridine coupling component Grant 4,016,152 - Dehnert , et al. April 5, 1	1977-04-05
Azo dye with a 3-cyano- or 3-carbamoyl-4-methyl-2,6-diamino-pyridine coupling component Grant 3,998,802 - Dehnert , et al. December 21, 1	1976-12-21
Water-soluble azo dyes having a substituted 2-hydroxypyridone (6) coupling component Grant 3,979,378 - Gnad , et al. September 7, 1	1976-09-07
Disperse azo dyes of the 2,6-diaminopyridine series Grant 3,950,321 - Dehnert , et al. April 13, 1	1976-04-13
Certain Substituted 2,6-diamino-4-methyl-nicotinonitriles The Corresponding Nicotinamides And Derivatives Thereof Grant 3,853,895 - Lamm , et al. December 10, 1	1974-12-10

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