Growing community of inventors

IJzendoom, Netherlands

John Heggen

Average Co-Inventor Count = 4.00

ph-index = 2

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 = 14

John HeggenEmil Fehr (2 patents)John HeggenBruno Keller (2 patents)John HeggenWilhelmus Cornelis Van Leeuwen (2 patents)John HeggenJohn Heggen (2 patents)Emil FehrEmil Fehr (8 patents)Bruno KellerBruno Keller (2 patents)Wilhelmus Cornelis Van LeeuwenWilhelmus Cornelis Van Leeuwen (2 patents)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Sulzer Chemtech Ag (2 from 179 patents)


2 patents:

1. 7377498 - Device in process engineering column

2. 7287746 - Device in a process engineering column

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as of
12/19/2025
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