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USPTO Patent Rankings Data through Dec 31, 2025
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Alan P. Risch — 5 Patents

UOUop: 3 patents #720 of 1,854Top 40%
UCUnion Carbide: 2 patents #417 of 1,402Top 30%
New Fairfield, CT: #64 of 222 inventorsTop 30%
Connecticut: #8,579 of 34,797 inventorsTop 25%
Overall (All Time): #907,971 of 4,157,543Top 25%
5 Patents All Time
Alan P. Risch has been granted 5 US patents while listed as an inventor at Uop. The first was granted in 1980 and the most recent in May 1991. Alan P. Risch ranks #907,971 of 4,157,543 US inventors in our database (top 21.8%). Patent records list Alan P. Risch in New Fairfield, CT, US.

Issued Patents All Time

Showing 1–5 of 5 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
5013703 Noble metal exchange of hydrophobic molecular sieves Mark T. Staniulis, Douglas E. Crozier, Jenny L. Pai 1991-05-07
4874590 Catalytic reduction of nitrogen oxides Mark T. Staniulis 1989-10-17
4867954 Catalytic reduction of nitrogen oxides Mark T. Staniulis, James G. Vassilakis, Donald F. Best 1989-09-19
4369131 Enhanced catalyst stability for cyclic co methanation operations Jule A. Rabo 1983-01-18 $2,213,000
4242104 Cyclic process for producing methane with catalyst regeneration Albert C. Frost 1980-12-30 $2,170,000