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USPTO Patent Rankings Data through Dec 31, 2025
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Roy Van Hal — 4 Patents

Merck: 3 patents #3,082 of 9,382Top 35%
Brunssum, NL: #11 of 60 inventorsTop 20%
Overall (All Time): #1,080,739 of 4,157,543Top 30%
4 Patents All Time
Roy Van Hal has been granted 4 US patents while listed as an inventor at Merck. The first was granted in 2007 and the most recent in January 2011. Roy Van Hal ranks #1,080,739 of 4,157,543 US inventors in our database (top 26.0%). Patent records list Roy Van Hal in Brunssum, NL.

Patents per Year

Patents granted per year, 2007 to 2011Bar chart with a peak of 1 patents in 2007.peak 12007: 1 patents20072009: 1 patents20092010: 1 patents20102011: 1 patents2011

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7863458 Halogen-free ionic liquids Peter Wasserscheid, Andreas Bösmann 2011-01-04 $60,246,000
7655803 Process for the preparation of ionic liquids with alkyl sulfate and functionalized alkyl sulfate anions Peter Wasserscheid, Claus Hilgers 2010-02-02 $130,144,000
7544807 Ionic liquids Peter Wasserscheid, Andreas Bösmann 2009-06-09 $83,811,000
7252791 Ionic liquids Peter Wasserscheid, Andreas Bösmann 2007-08-07

Frequent Collaborators

Peter Wasserscheid4 shared
Andreas Bösmann3 shared
Claus Hilgers1 shared

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Jagadeesh Kandasamy4
Ross CABOT4
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Franz A. Gruswitz4
Tommy Glimberg4
Vinayakaraddy Gulabal4
Sandra Bittorf4
Aviel FOGEL4
Eric Matthew Walton4