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De Bilt, Netherlands

Grontmij Advies & Techniek B.v.

USPTO Granted Patents = 3

Forward Citations = 62

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4 inventors (with patents filed for the assignee):

Joseph Johannes Heijnen (2 out of 8 patents)

Marinus Cornelius Maria Van Loosdrecht (1 out of 1 patent)

Hermanus H Oude Luttighuis (1 out of 1 patent)

4. Marinus Cornelis Van Loosdrecht (1 out of 1 patent)

3 patents: Sort by Forward Citations

1. 6183642 - Biological treatment of wastewater (2001-02-06),

2. 5863435 - Biological treatment of wastewater (1999-01-26),

3. 5578114 - Biological filter provided with a pelletized biologically active compost (1996-11-26),

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USPTO Data Jan 1 1976 - Dec 30 2025

3 Patents

#1 in De Bilt

#1,635 in Netherlands

De Bilt, Netherlands

Grontmij Advies & Techniek B.v.

Forward Citations = 62

4 inventors:

Joseph Johannes Heijnen (2 out of 8 patents)

Marinus Cornelius Maria Van Loosdrecht (1 out of 1 patent)

Hermanus H Oude Luttighuis (1 out of 1 patent)

4. Marinus Cornelis Van Loosdrecht (1 out of 1 patent)

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