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USPTO Patent Rankings Data through Dec 31, 2025
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Robert E. Trotter — 9 Patents

EAE.I. Du Pont De Nemours And: 9 patents #1,180 of 12,129Top 10%
TATate & Lyle Ingredients Americas: 1 patents #46 of 112Top 45%
Hockessin, DE: #124 of 555 inventorsTop 25%
Delaware: #1,067 of 7,163 inventorsTop 15%
Overall (All Time): #535,341 of 4,157,543Top 15%
9 Patents All Time
Robert E. Trotter has been granted 9 US patents while listed as an inventor at E.I. Du Pont De Nemours And. The first was granted in 1993 and the most recent in May 2012. Robert E. Trotter ranks #535,341 of 4,157,543 US inventors in our database (top 12.9%). Patent records list Robert E. Trotter in Hockessin, DE, US.

Patents per Year

Patents granted per year, 1993 to 2012Bar chart with a peak of 3 patents in 2009.peak 31993: 1 patents19931995: 1 patents19952006: 1 patents20062007: 1 patents20072009: 3 patents20092011: 1 patents20112012: 1 patents2012

Issued Patents All Time

Showing 1–9 of 9 patents

Patent #TitleCo-InventorsDateApprox Value ⓘ
8183417 Purification of biologically-produced 1,3-propanediol Dennis N. Adkesson, Albert W. Alsop, Tyler T. Ames, Luis Alberto Chu, James M. Disney +10 more 2012-05-22 $22,707,000
7919658 Purification of biologically-produced 1,3-propanediol Dennis M. Adkesson, James S. Disney, Bryan C. Dravis, James Gaddy, William F. Lehnhardt +10 more 2011-04-05 $11,358,000
7531617 Continuous process for producing poly(trimethylene terephthalate) John Harvey Eng, Emily A. Blum, Daniel Albert Green, Carl J. Giardino, Gene Parrish +1 more 2009-05-12 $15,987,000
7524921 Continuous manufacture of poly(trimethylene terephthalate) John Harvey Eng, Emily A. Blum, Daniel Albert Green, Carl J. Giardino, Gene Parrish +1 more 2009-04-28 $16,928,000
7504474 Poly(trimethylene therephthalate) continuous manufacturing process John Harvey Eng, Emily A. Blum, Daniel Albert Green, Gene Parrish, Gary Wilson 2009-03-17 $6,150,000
7211699 Purification of biochemically derived 1,3-propanediol Mayis Seapan, George F. Diffendall, Tyler T. Ames, F. Glenn Gallagher 2007-05-01 $17,027,000
7098368 Hydrogenation of biochemical derived 1,3 -propanediol Mayis Seapan, George F. Diffendall, Tyler T. Ames, F. Glenn Gallagher 2006-08-29 $10,867,000
5391263 Process for the separation of glycols from dimethyl terephthalate Richard Redfearn Hepner, Robert E. Michel 1995-02-21 $12,213,000
5209825 Preparation of purified concentrated BDO Hashim M. Badat, Peter Gideon Gelblum 1993-05-11 $8,888,000