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Steinau-Ulmbach, Germany

Horst Birkhan

Average Co-Inventor Count = 3.33

ph-index = 3

The patent ph-index is calculated by counting the number of publications for which an author has been cited by other authors at least that same number of times.

Forward Citations = 24

Horst Birkhan ↔ Michael Fender (2 patents)Horst Birkhan ↔ Winfried Wehner (2 patents)Horst Birkhan ↔ Hans-Juergen Kohle (2 patents)Horst Birkhan ↔ Joachim Weigand (1 patent)Horst Birkhan ↔ Simone Schussler (1 patent)Horst Birkhan ↔ Bernhard Irrgang (1 patent)Horst Birkhan ↔ Joachim Welgand (1 patent)Horst Birkhan ↔ Christiane Loffert (1 patent)Horst BirkhanHorst Birkhan (4 patents)Michael FenderMichael Fender (10 patents)Winfried WehnerWinfried Wehner (6 patents)Hans-Juergen KohleHans-Juergen Kohle (2 patents)Joachim WeigandJoachim Weigand (5 patents)Simone SchusslerSimone Schussler (3 patents)Bernhard IrrgangBernhard Irrgang (1 patent)Joachim WelgandJoachim Welgand (1 patent)Christiane LoffertChristiane Loffert (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Rewo Chemische Werke Gmbh (3 from 10 patents)

2. Witco Surfactants Gmbh (1 from 6 patents)


4 patents:

1. 5703035 - Highly concentrated aqueous fabric softners having improved storage

2. 5364542 - Fabric softener rinsing agents

3. 5254270 - Fabric softeners based on quaternary poly(oxyalkylene) alkanolamine

4. 5180508 - Fabric softener rinsing agents

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as of
12/6/2025
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