Walter Helmling

Issued Patents All Time

Patent #	Title	Co-Inventors	Date
5563248	Fiber reactive formazan dyes containing a vinyl sulfonyl reactive group	Philomen Z. deCroos	1996-10-08
5539109	Fiber-reactive triphenodioxazine dyes	Uwe Reiher	1996-07-23
5532362	Fiber-reactive triphenodioxazine dyes	David Brunetti, Uwe Reiher	1996-07-02
5484459	Mixture of water soluble reactive dyes and their use	—	1996-01-16
5393884	Fiber reactive anthraquinone dyes	Ronald Pedemonte	1995-02-28
5350838	High temperature process for preparing fiber reactive dyes	Mark Alan Helle	1994-09-27
5003053	Water-soluble monoazo compounds containing a p-aminophenylamino- and chloro- or fluoro-substituted triazinylamino group and a fiber-reactive group selected from the vinylsulfone series, suitable as dyestuffs	Hartmut Springer, Ludwig Schlafer, Werner Russ	1991-03-26
4898944	Precursors for the preparation of water-soluble triphendioxazine dyestuffs	Gunther Schwaiger, Hartmut Springer	1990-02-06
4895954	Precursors for synthesis of triphendioxazine dyestuffs	Gunther Schwaiger, Hartmut Springer	1990-01-23
4885385	Sulfonyl containing compounds suitable as precurors for water-soluble fiber-reactive triphendioxazine compounds	Hartmut Springer, Gunther Schwaiger	1989-12-05
4851527	Water-soluble triphendioxazine compounds	Hartmut Springer, Gunther Schwaiger	1989-07-25
4816574	Water-soluble triphendioxazine compounds	Gunther Schwaiger, Hartmut Springer	1989-03-28
4786728	Water-soluble triphendioxazine compounds	Gunther Schwaiger, Hartmut Springer	1988-11-22
4785099	Water-soluble triphendioxazine compounds	Hartmut Springer, Gunther Schwaiger	1988-11-15
4782150	Water-soluble triphendioxazine compounds	Hartmut Springer, Gunther Schwaiger	1988-11-01
4774333	Water-soluble triphendioxazine compounds and sulfonyl-containing precursors thereof, processes for the preparation thereof and use of the triphendioxazines as dyes	Hartmut Springer, Gunther Schwaiger	1988-09-27

Issued Patents All Time

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