Growing community of inventors

Durbanville, South Africa

Petrus Johannes Hoffmann

Average Co-Inventor Count = 5.00

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 = 8

Petrus Johannes HoffmannCyril David Knottenbelt (2 patents)Petrus Johannes HoffmannCarl Dunlop (2 patents)Petrus Johannes HoffmannLeon Walliser (2 patents)Petrus Johannes HoffmannStewart Hlohloza (2 patents)Petrus Johannes HoffmannPetrus Johannes Hoffmann (2 patents)Cyril David KnottenbeltCyril David Knottenbelt (6 patents)Carl DunlopCarl Dunlop (4 patents)Leon WalliserLeon Walliser (2 patents)Stewart HlohlozaStewart Hlohloza (2 patents)
..
Inventor’s number of patents
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Strength of working relationships

Company Filing History:

1. The Petroleum Oil and Gas Corporation of South Africa (pty) Ltd. (2 from 9 patents)


2 patents:

1. 7429553 - Process for reducing the toxicity of hydrocarbons

2. 7326817 - Process for reducing the toxicity of hydrocarbons

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as of
12/10/2025
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