Growing community of inventors

Amsterdam, Netherlands

Johannes Didericus De Graaf

Average Co-Inventor Count = 2.50

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

Johannes Didericus De GraafFranciscus Gerardus Van Dongen (3 patents)Johannes Didericus De GraafSytze A Posthuma (1 patent)Johannes Didericus De GraafAnthony Malcolm Rigby (1 patent)Johannes Didericus De GraafSjoerd Bosch (1 patent)Johannes Didericus De GraafJacobus Henricus Gerardus Beurskens (1 patent)Johannes Didericus De GraafJan Boelen (1 patent)Johannes Didericus De GraafJohannes Didericus De Graaf (5 patents)Franciscus Gerardus Van DongenFranciscus Gerardus Van Dongen (10 patents)Sytze A PosthumaSytze A Posthuma (3 patents)Anthony Malcolm RigbyAnthony Malcolm Rigby (2 patents)Sjoerd BoschSjoerd Bosch (1 patent)Jacobus Henricus Gerardus BeurskensJacobus Henricus Gerardus Beurskens (1 patent)Jan BoelenJan Boelen (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Shell Oil Comapny (5 from 7,646 patents)


5 patents:

1. 7008460 - Process for the production thermally converted light products and electricity

2. 6886501 - Apparatus and process for heating steam

3. 6840199 - Process for heating system

4. 6766772 - Apparatus for heating steam

5. 5068254 - Process for the preparation of hydrocarbons

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as of
12/19/2025
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