Inventor · disambiguated record
Derek D. Chapman
Also filed as: CHAPMAN DEREK D · CHAPMAN DEREK DAVIS
3 granted patents·42 citations·filing 1973–1981
67Inventor score
Files withEASTMAN KODAK CO3
Top patents by PatentIndex Score
3 records- 0182US4003750ASilver halide emulsion containing photographic sensitizing dyesEASTMAN KODAK CO·Filed 1973·Granted Jan 18, 1977·33 cites·19 claims
- 0263US4358404ANondiffusible 6-arylazo-3-pyridinolEASTMAN KODAK CO·Filed 1981·Granted Nov 9, 1982·9 cites·16 claims
- 0325US4081275APhotographic film units containing colorless para-nitrobenzylidene dye-forming compoundsEASTMAN KODAK CO·Filed 1976·Granted Mar 28, 1978·0 cites·28 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →