Growing community of inventors

Houston, TX, United States of America

Frederik M Duysings

Average Co-Inventor Count = 4.00

ph-index = 1

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 = 4

Frederik M Duysings ↔ James A Salter (1 patent)Frederik M Duysings ↔ Thomas R Schmidt (1 patent)Frederik M Duysings ↔ Rudi Everts (1 patent)Frederik M Duysings ↔ Johannes W Van Der Meer (1 patent)Frederik M Duysings ↔ David Matthew Brown (1 patent)Frederik M Duysings ↔ Chandler H Barkelew (1 patent)Frederik M Duysings ↔ David B Baxter (1 patent)Frederik M DuysingsFrederik M Duysings (2 patents)James A SalterJames A Salter (14 patents)Thomas R SchmidtThomas R Schmidt (9 patents)Rudi EvertsRudi Everts (7 patents)Johannes W Van Der MeerJohannes W Van Der Meer (5 patents)David Matthew BrownDavid Matthew Brown (3 patents)Chandler H BarkelewChandler H Barkelew (1 patent)David B BaxterDavid B Baxter (1 patent)
..
Inventor’s number of patents
..
Strength of working relationships

Company Filing History:

1. Shell Oil Comapny (2 from 7,646 patents)


2 patents:

1. 4850001 - Orifice blockage detection system

2. 4750434 - Mill/dryer gas temperature control

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1/9/2026
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