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Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
HC

Hal B. H. Cooper — 8 Patents

ETEc&C Technologies: 5 patents #2 of 7Top 30%
La Cañada Flintridge, CA: #63 of 465 inventorsTop 15%
California: #74,834 of 386,348 inventorsTop 20%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
Hal B. H. Cooper has been granted 8 US patents while listed as an inventor at Ec&C Technologies. The first was granted in 1984 and the most recent in November 2010. Hal B. H. Cooper ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Hal B. H. Cooper in La Cañada Flintridge, CA, US.

Patents per Year

Patents granted per year, 1984 to 2010Bar chart with a peak of 2 patents in 1984.peak 21984: 2 patents19842000: 1 patents20002001: 1 patents20012003: 1 patents20032004: 1 patents20042007: 1 patents20072010: 1 patents2010

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDate
7842264 Process and apparatus for carbon capture and elimination of multi-pollutants in flue gas from hydrocarbon fuel sources and recovery of multiple by-products Robert E. Tang, Donald E. Degling, Thomas K. Ewan, Sam M. Ewan 2010-11-30
7220395 Methods for the production of ammonia from urea and/or biuret, and uses for NOx and/or particulate matter removal Herbert W. Spencer, III 2007-05-22
6730280 Methods for the production of ammonia from urea and/or biuret, and uses for NOx and/or particulate matter removal Herbert W. Spencer, III 2004-05-04
6506350 Method using on site generated ammonia to reduce particulates in combustion gas streams Herbert W. Spencer, III 2003-01-14
6322762 Method using on site generated ammonia to reduce particulates Herbert W. Spencer, III 2001-11-27
6077491 Methods for the production of ammonia from urea and/or biuret, and uses for NO.sub.x and/or particulate matter removal Herbert W. Spencer, III 2000-06-20
4426364 Removal and recovery of nitrogen oxides and sulfur dioxide from gaseous mixtures containing them 1984-01-17
4425313 Removal and recovery of nitrogen and sulfur oxides from gaseous mixtures containing them 1984-01-10