Growing community of inventors

Nijmegen, Netherlands

Jan Van Alfen

Average Co-Inventor Count = 4.00

ph-index = 4

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 = 73

Jan Van AlfenSebastiaan Wilhelmus Josephus Den Boer (5 patents)Jan Van AlfenGerrit Jan Stegeman (5 patents)Jan Van AlfenShi Ming Pun (3 patents)Jan Van AlfenLenny Marita Ellenkamp-van Olst (2 patents)Jan Van AlfenLenny Marita Ellenkamp-Van Olst (0 patent)Jan Van AlfenJan Van Alfen (5 patents)Sebastiaan Wilhelmus Josephus Den BoerSebastiaan Wilhelmus Josephus Den Boer (21 patents)Gerrit Jan StegemanGerrit Jan Stegeman (11 patents)Shi Ming PunShi Ming Pun (5 patents)Lenny Marita Ellenkamp-van OlstLenny Marita Ellenkamp-van Olst (10 patents)Lenny Marita Ellenkamp-Van OlstLenny Marita Ellenkamp-Van Olst (0 patent)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. Plasticum Netherlands B.v. (4 from 7 patents)

2. Plasticum Group B.v. (1 from 7 patents)


5 patents:

1. 9511906 - Closure with tamper-evident strip having bent end portions

2. 9409680 - Tamper evident closure

3. 9340335 - Closure assembly with valve and method for its manufacturing

4. 9090386 - Closure with tamper-evident strip

5. 8640928 - Closure assembly with valve and method for its manufacturing

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as of
12/13/2025
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