Patent Leaderboard
USPTO Patent Rankings Data through Dec 31, 2025
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Leonard E. Stark — 8 Patents

AMAmoco: 3 patents #256 of 1,251Top 25%
OIOpta Food Ingredients: 2 patents #12 of 25Top 50%
ENEnzytech: 1 patents #6 of 11Top 55%
S(Standard Oil Company (Indiana): 1 patents #254 of 576Top 45%
MTMonsanto Technology: 1 patents #1,973 of 1,657Top 120%
Robinson, IL: #2 of 21 inventorsTop 10%
Illinois: #11,515 of 84,256 inventorsTop 15%
Overall (All Time): #600,572 of 4,157,543Top 15%
8 Patents All Time
Leonard E. Stark has been granted 8 US patents while listed as an inventor at Amoco. The first was granted in 1980 and the most recent in June 2001. Leonard E. Stark ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list Leonard E. Stark in Robinson, IL, US.

Issued Patents All Time

Showing 1–8 of 8 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
6248374 Stabilized food additive Ralph Murray, Sr. 2001-06-19 $88,317,000
5695794 Use of 25-hydroxycholecalciferol in a dietary supplement process for ameliorating the effects of tibial dyschondroplasia in poultry while maintaining weight gain James G. Yarger, Samuel Graham Perry 1997-12-09 $183,972,000
5330778 Hydrophobic protein microparticles Akiva Gross 1994-07-19 $805,000
5145702 Hydrophobic protein microparticles and preparation thereof Akiva Gross 1992-09-08 $545,000
5021248 Hydrophobic protein microparticles and preparation thereof Akiva Gross 1991-06-04
4835307 Method and apparatus for controlling the manufacture of terephthalic acid to control the level and variability of the contaminant content and the optical density Harold A. Lindahl, Kenneth J. Abrams, Martin A. Zeitlin 1989-05-30 $23,516,000
4675438 Direct continuous flow integration of production and purification of high purity iso- or terephthalic acid Michael Schwartz 1987-06-23 $28,254,000
4185073 Apparatus for iso- or terephthalic acid production in and recovery from benzoic acid-water solvent system David Marsh 1980-01-22 $9,953,000