Inventor · disambiguated record
Llewellyn J. Leyshon
Also filed as: LEYSHON LLEWELLYN J
14 granted patents·73 citations·filing 1987–2003
90Inventor score
Files withEASTMAN KODAK CO14
Top patents by PatentIndex Score
14 records- 0185US4749645AHeterocyclic phosphorus compound stabilizersEASTMAN KODAK CO·Filed 1987·Granted Jun 7, 1988·21 cites·8 claims
- 0279US4782011ABisphenol derivative stabilizersEASTMAN KODAK CO·Filed 1987·Granted Nov 1, 1988·16 cites·7 claims
- 0376US6245480B1High contrast photographic element containing a novel nucleatorEASTMAN KODAK CO·Filed 2000·Granted Jun 12, 2001·5 cites·27 claims
- 0475US6444412B1Photographic element with dye-forming coupler and stabilizing compoundEASTMAN KODAK CO·Filed 2001·Granted Sep 3, 2002·4 cites·16 claims
- 0566US5021333AColor photographic element, compounds and processEASTMAN KODAK CO·Filed 1990·Granted Jun 4, 1991·9 cites·8 claims
- 0664US6756189B2Photographic elements containing cyan coupler UV absorber and stabilizerEASTMAN KODAK CO·Filed 2002·Granted Jun 29, 2004·2 cites·31 claims
- 0764US6713226B2High contrast photographic element containing a polyhydrazide nucleating agentEASTMAN KODAK CO·Filed 2003·Granted Mar 30, 2004·2 cites·18 claims
- 0861US6004738APhotographic elements containing cyan dye-forming coupler, coupler solvent and bisphenol derivativeEASTMAN KODAK CO·Filed 1997·Granted Dec 21, 1999·4 cites·22 claims
- 0960US6071683AImage dye-forming couplers and photographic elements containing themEASTMAN KODAK CO·Filed 1998·Granted Jun 6, 2000·4 cites·23 claims
- 1058US6444417B1Photographic element containing cyan dye-forming couplerEASTMAN KODAK CO·Filed 2001·Granted Sep 3, 2002·2 cites·14 claims
- 1145US4777121ASubstituted pyrazolo[3, 2-c]-s-triazole photographic couplers and photographic materials and processes employing themEASTMAN KODAK CO·Filed 1987·Granted Oct 11, 1988·4 cites·14 claims
- 1240US6312881B1Photographic element with yellow dye-forming coupler and stabilizing compoundsEASTMAN KODAK CO·Filed 2000·Granted Nov 6, 2001·0 cites·23 claims
- 1338US6790585B2Method for developing a high contrast photographic material containing a polyhydrazide nucleating agentEASTMAN KODAK CO·Filed 2003·Granted Sep 14, 2004·0 cites·19 claims
- 1426US6699650B1Photographic couplers having improved image dye light stabilityEASTMAN KODAK CO·Filed 1999·Granted Mar 2, 2004·0 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →