Growing community of inventors

Hilden, Germany

Kai Verkerk

Average Co-Inventor Count = 6.37

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 = 57

Kai VerkerkGeorg Ronge (4 patents)Kai VerkerkMichael Schelhaas (3 patents)Kai VerkerkDietmar Wastian (3 patents)Kai VerkerkTim Loddenkemper (3 patents)Kai VerkerkJoachim Zechlin (3 patents)Kai VerkerkWilfried Pinke (3 patents)Kai VerkerkBerthold Keggenhoff (2 patents)Kai VerkerkKatrin Joschek (2 patents)Kai VerkerkFriedhelm Steffens (1 patent)Kai VerkerkHorst Surburg (1 patent)Kai VerkerkStephan Klein (1 patent)Kai VerkerkChristine Mendoza-Frohn (1 patent)Kai VerkerkHans-Peter Schal (1 patent)Kai VerkerkGerhard Ruffert (1 patent)Kai VerkerkBill Brady (1 patent)Kai VerkerkDirk Müller (1 patent)Kai VerkerkKartin Joschek (1 patent)Kai VerkerkMarcus Paul Grün (1 patent)Kai VerkerkBill Brady, Jr (1 patent)Kai VerkerkKai Verkerk (6 patents)Georg RongeGeorg Ronge (21 patents)Michael SchelhaasMichael Schelhaas (29 patents)Dietmar WastianDietmar Wastian (20 patents)Tim LoddenkemperTim Loddenkemper (19 patents)Joachim ZechlinJoachim Zechlin (11 patents)Wilfried PinkeWilfried Pinke (3 patents)Berthold KeggenhoffBerthold Keggenhoff (24 patents)Katrin JoschekKatrin Joschek (3 patents)Friedhelm SteffensFriedhelm Steffens (36 patents)Horst SurburgHorst Surburg (29 patents)Stephan KleinStephan Klein (16 patents)Christine Mendoza-FrohnChristine Mendoza-Frohn (15 patents)Hans-Peter SchalHans-Peter Schal (7 patents)Gerhard RuffertGerhard Ruffert (4 patents)Bill BradyBill Brady (4 patents)Dirk MüllerDirk Müller (2 patents)Kartin JoschekKartin Joschek (1 patent)Marcus Paul GrünMarcus Paul Grün (1 patent)Bill Brady, JrBill Brady, Jr (1 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Bayer Materialscience Ag (3 from 532 patents)

2. Bayer Aktiengesellschaft (2 from 12,157 patents)

3. Haarmann & Reimer Gmbh (1 from 113 patents)


6 patents:

1. 7202384 - Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate

2. 7202378 - Process for producing 5-nitro-3,4-dihydro-1(H)-naphthalinone, 1,5-naphthalenediamine and 1,5-naphthalene diisocyanate

3. 7118653 - Process for the purification of mixtures of toluenediisocyanate incorporating a dividing-wall distillation column

4. 7108770 - Process for the purification of toluene diisocyanate incorporating a dividing-wall distillation column for the final purification

5. 7057071 - Process for producing 5-nitro-3,4-dihydro-1(2H)-naphthalinone, 1-5-naphthalenediamine and 1,5-naphthalene diisocyanate

6. 6458972 - Process for the preparation of macrocyclic esters

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as of
12/7/2025
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