Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Leo E. Hakka — 12 Patents

CTCansolv Technologies: 6 patents #1 of 9Top 15%
UTUnion Carbide Chemicals & Plastics Technology: 4 patents #143 of 701Top 25%
ULUnion Carbide Canada Limited: 2 patents #3 of 28Top 15%
Dollard-Des-Ormeaux, CA: #29 of 298 inventorsTop 10%
Overall (All Time): #396,045 of 4,157,543Top 10%
12 Patents All Time
Leo E. Hakka has been granted 12 US patents while listed as an inventor at Cansolv Technologies. The first was granted in 1991 and the most recent in August 2008. Leo E. Hakka ranks #396,045 of 4,157,543 US inventors in our database (top 9.5%). Patent records list Leo E. Hakka in Dollard-Des-Ormeaux, QC, CA.

Issued Patents All Time

Showing 1–12 of 12 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
7416582 Method and apparatus for NOx and Hg removal Michel Ouimet, John Sarlis, Colin Ryan 2008-08-26
7384616 Waste gas treatment process including removal of mercury 2008-06-10
7214358 Low energy regenerable SO2 scrubbing process Patrick M. Ravary, John Sarlis, Paul Parisi 2007-05-08
7056482 Method for recovery of CO2 from gas streams Michel Ouimet 2006-06-06
6872371 Method and apparatus for NOx and SO2 removal Michel Ouimet 2005-03-29
6531103 Process for removing sulfur compounds from gas and liquid hydrocarbon streams Paulino Forte 2003-03-11
6342169 Safe storage and transportation of sulfur dioxide Paul Parisi 2002-01-29
5292407 Process for converting heat stable amine salts to heat regenerable amine salts Veronique Roy, Jean I. Sarlis 1994-03-08 $6,007,000
5262139 Removal of sulfur dioxide from gas streams Paul Parisi 1993-11-16 $6,271,000
5202103 Removal of sulfur dioxide from gas streams John C. H. Chang, Veronique Roy 1993-04-13 $2,300,000
5019361 Removal and recovery of sulphur dioxide from gas streams 1991-05-28 $4,198,000
5017350 Gas scrubbing process John Sarlis 1991-05-21 $5,651,000