Inventor · disambiguated record
Heinrich Frolich
Also filed as: FROELICH HEINRICH · FROLICH HEINRICH
7 granted patents·41 citations·filing 1973–1990
82Inventor score
Files withHOECHST AG7
Top patents by PatentIndex Score
7 records- 0186US4251441APigments of mixtures of methoxynitrobenzene-azo-methoxy-acetanilidesHOECHST AG·Filed 1979·Granted Feb 17, 1981·13 cites·2 claims
- 0276US4150019AWater-insoluble yellow terephthalate-azo-acetoacetylamido-benzimidazolone dyestuffsHOECHST AG·Filed 1973·Granted Apr 17, 1979·8 cites·4 claims
- 0369US4665163ADiaryl pigments with improved heat stability obtained by coupling bis-diazotized diamines with acetoacetanilidesHOECHST AG·Filed 1983·Granted May 12, 1987·9 cites·3 claims
- 0450US5128454Aβ-modified crystalline fed monoazo pigmentHOECHST AG·Filed 1990·Granted Jul 7, 1992·4 cites·10 claims
- 0549US4987258A4,4'-diaminodiphenyl compounds, process for their preparation and their useHOECHST AG·Filed 1987·Granted Jan 22, 1991·6 cites·8 claims
- 0630US4987221ABisdiazonium salts of 4,4'-diamino-3,3'-dialkoxybiphenyls and a process for their preparationHOECHST AG·Filed 1986·Granted Jan 22, 1991·0 cites·5 claims
- 0730US4696675AProcess for preparing water-insoluble blue azo dyes on the fiber: hydroxynaphthoic amide and diazotized di-alkoxy-benzidineHOECHST AG·Filed 1986·Granted Sep 29, 1987·1 cites·22 claims
Join the waitlist — get patent alerts
Get an alert when Heinrich Frolich files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →