Inventor · disambiguated record
Alfred Frei
Also filed as: FREI ALFRED
4 granted patents·35 citations·filing 1973–1977
74Inventor score
Technology areasC09B
Top patents by PatentIndex Score
4 records- 0183US4023924AConcentrated aqueous dye compositions containing a low molecular weight amide and their use for dyeing paperSANDOZ LTD·Filed 1973·Granted May 17, 1977·16 cites·18 claims
- 0271US4198268AProcess for producing colored paper using granulated dye compositionsSANDOZ AG·Filed 1975·Granted Apr 15, 1980·8 cites·18 claims
- 0371US4149851AConcentrated aqueous dye compositions containing a low molecular weight amideFIDELITY UNION TRUST COMPANY E·Filed 1977·Granted Apr 17, 1979·9 cites·20 claims
- 0441US4083681ACompositions of metal complexes of disazo acid dyes stabilized with amino ethersSANDOZ LTD·Filed 1975·Granted Apr 11, 1978·2 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →