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USPTO Patent Rankings Data through Dec 31, 2025
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David L. Sikkenga — 36 Patents

AMAmoco: 24 patents #7 of 1,251Top 1%
BABp Corporation North America: 5 patents #34 of 812Top 5%
S(Standard Oil Company (Indiana): 4 patents #64 of 576Top 15%
BABp Amoco: 1 patents #58 of 196Top 30%
FVFuranix Technologies B, V.: 1 patents #24 of 50Top 50%
Wheaton, IL: #16 of 884 inventorsTop 2%
Illinois: #1,490 of 84,256 inventorsTop 2%
Overall (All Time): #92,222 of 4,157,543Top 3%
36 Patents All Time
David L. Sikkenga has been granted 36 US patents while listed as an inventor at Amoco. The first was granted in 1984 and the most recent in April 2019. David L. Sikkenga ranks #92,222 of 4,157,543 US inventors in our database (top 2.2%). Patent records list David L. Sikkenga in Wheaton, IL, US.

Issued Patents All Time

Showing 1–25 of 36 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
10259769 Conversion of polystyrene to benzoic acid 2019-04-16
9643945 Process for the preparation of 2,5-furan-dicarboxylic acid Etienne Mazoyer, Ana Sofia Vagueiro De Sousa Dias, Benjamin McKay, Hendrikus Jacob Baars, Victor Peter Charles Vreeken +1 more 2017-05-09
7485746 Staged countercurrent oxidation Frank G. Belmonte, Olusola Sunday Ogundiran, Kenneth J. Abrams, Linus K. Leung, Christopher G. Meller +2 more 2009-02-03
7465824 Process for the production of high purity aromatic carboxylic acids using a benzoic acid and water solvent for oxidation and purification Carolyn E. Schmit, Christopher G. Meller 2008-12-16
7005011 Method of removing iron oxide deposits from the surface of titanium components Frank G. Belmonte, Kenneth J. Abrams, James Delaney, Jr., Scott G. Kramer 2006-02-28
6852879 Method of removing iron oxide deposits from the surface of titanium components Frank G. Belmonte, Kenneth J. Abrams, James Delaney, Jr., Scott G. Kramer 2005-02-08
6562997 Production of high purity aromatic carboxylic acid by oxidation in benzoic acid and water solvent Alpen K. Pandya, Ian C. Zaenger, Kenneth J. Abrams, Thomas M. Bartos 2003-05-13
6255525 Process for preparing purified carboxylic acids M. Michelle Morie-Bebel, Stephen V. Hoover 2001-07-03 $247,893,000
5770764 Process for preparing purified aromatic polycarboxylic acids Martin A. Zeitlin, Stephen V. Hoover, Paul K. Behrens 1998-06-23 $63,900,000
5728870 Process for preparing purified 2,6-naphthalenedicarboxylic acid Juergen K. Holzhauer, Rusins Albertins, Stephen V. Hoover 1998-03-17 $164,553,000
5629446 Process for preparing purified 2,6-naphthalenedicarboxylic acid Juergen K. Holzhauer, Rusins Albertins, Stephen V. Hoover 1997-05-13 $45,468,000
5563294 Process for preparing purified 2,6-naphthalenedicarboxylic acid Juergen K. Holzhauer, Rusins Albertins, Stephen V. Hoover 1996-10-08 $46,423,000
5473102 Process for recovery of aromatic acid and dihydric alcohol from waste polyester resins Floyd Johnson, Kalpana Danawala, Bruce I. Rosen 1995-12-05 $37,993,000
5401892 Preparation of a dimethyltetralin by cyclizing an orthotolylpentene phenylhexene using an ultra-stable crystalline aluminosilicate molecular sieve y-zeolite Ian C. Zaenger, Joyce D. Lamb, Gregory S. Williams 1995-03-28 $35,988,000
5350874 Process for preparing diesters of naphthalenedicarboxylic acids Paul K. Behrens, Juergen K. Holzhauer, Gregory P. Hussmann 1994-09-27 $128,626,000
5292934 Method for preparing aromatic carboxylic acids George E. Kuhlmann, Paul K. Behrens, Martin A. Zeitlin, Stephen V. Hoover 1994-03-08 $27,465,000
5284987 Preparation of a dimethyltetralin in a distillation reactor Ian C. Zaenger, Gregory S. Williams 1994-02-08 $122,848,000
5256817 Method for purifying a naphthalenedicarboxylic acid Stephen V. Hoover 1993-10-26 $46,594,000
5118892 Preparation of a dimethylnaphthalene Ian C. Zaenger, Gregory S. Williams 1992-06-02 $22,405,000
5073670 Preparation of a dimethyltetralin Joyce D. Lamb, Ian C. Zaenger, Gregory S. Williams 1991-12-17 $22,377,000
5034561 Catalytic alkenylbenzene cyclization Gregory S. Williams, Ian C. Zaenger 1991-07-23 $74,797,000
5030781 Preparation of a dimethyltetralin Ian C. Zaenger, Gregory S. Williams 1991-07-09 $29,334,000
5012024 Preparation of a dimethylnaphthalene Ian C. Zaenger, Gregory S. Williams 1991-04-30 $22,076,000
4999326 Palladium catalyst reactivation Ian C. Zaenger, Gregory S. Williams 1991-03-12 $147,162,000
4990717 Monoalkenylation of alkylbenzenes in a fixed catalyst bed 1991-02-05 $26,018,000