Inventor · disambiguated record
Siegbert Rittner
Also filed as: RITTNER SIEGBERT
25 granted patents·111 citations·filing 1985–1995
95Inventor score
Top patents by PatentIndex Score
25 records- 0177US5028736AProcess for the separation and recovery of naphthalene-sulfonic acids from aqueous solutionsHOECHST AG·Filed 1990·Granted Jul 2, 1991·20 cites·1 claims
- 0266US4683034AProcess for separating dimethyl isophthalate and dimethyl orthophthalate from their mixture with dimethyl terephthalateHOECHST AG·Filed 1985·Granted Jul 28, 1987·10 cites·16 claims
- 0362US5152875ASeparation of m- and p-dichlorobenzeneHOECHST AG·Filed 1991·Granted Oct 6, 1992·7 cites·13 claims
- 0460US5419815AProcess for purifying fatty acid amidesHOECHST AG·Filed 1993·Granted May 30, 1995·9 cites·19 claims
- 0560US4916257AProcess for the purification of 2-hydroxynaphthalene-6-carboxylic acidHOECHST AG·Filed 1989·Granted Apr 10, 1990·6 cites·9 claims
- 0659US5447541AProcess for separating and purifying substances by crystallization from the melt under high pressureHOECHST AG·Filed 1994·Granted Sep 5, 1995·6 cites·2 claims
- 0752US5447542AProcess for separating and purifying substances by crystallization from the meltHOECHST AG·Filed 1994·Granted Sep 5, 1995·4 cites·3 claims
- 0851US4918225AProcess for the preparation of pure crotonic acidsHOECHST AG·Filed 1985·Granted Apr 17, 1990·5 cites·2 claims
- 0947US5013444AProcess for separating off enol ethers from reaction mixtures containing alcoholsHOECHST AG·Filed 1990·Granted May 7, 1991·3 cites·17 claims
- 1044US5532406AProcess for preparing aromatic hydroxycarboxylic acidsHOECHST AG·Filed 1994·Granted Jul 2, 1996·3 cites·20 claims
- 1143US5401859AProcess for the preparation of pure trioxaneHOECHST AG·Filed 1993·Granted Mar 28, 1995·2 cites·13 claims
- 1240US5543564AProcess for releasing acidic organic compounds from salts thereof by carbon dioxideHOECHST AG·Filed 1995·Granted Aug 6, 1996·2 cites·15 claims
- 1339US5808142AProcess for the preparation of 2-hydroxynaphthalene-6-carboxylic acidHOECHST AG·Filed 1994·Granted Sep 15, 1998·2 cites·4 claims
- 1439US5643494AProcess for the preparation of aromatic hydroxy carboxylic acidsHOECHST AG·Filed 1995·Granted Jul 1, 1997·2 cites·20 claims
- 1539US5271811AProcess for purifying 2-(4-isobutylphenyl)-propionic acid by vacuum distillationHOECHST CELANESE CORP·Filed 1993·Granted Dec 21, 1993·2 cites·26 claims
- 1638US5281479ACorrosion and heat-resistant ordered packing for mass transfer and heat exchange processesSIGRI GREAT LAKES CARBON GMBH·Filed 1992·Granted Jan 25, 1994·8 cites·18 claims
- 1737US5312976AProcess for the preparation of 2-hydroxy-naphthalene-6-carboxylic acidHOECHST AG·Filed 1991·Granted May 17, 1994·2 cites·7 claims
- 1836US5136083AProcess for the purification of 4-acetoxystyreneHOECHST CELANESE CORP·Filed 1990·Granted Aug 4, 1992·2 cites·24 claims
- 1934US4925959ADioxane adduct of 2-hydroxynaphthalene-6-carboxylic acid and process for the preparation thereofHOECHST AG·Filed 1989·Granted May 15, 1990·0 cites·1 claims
- 2034US4617197AProcess for improving the wetting characteristics of the surface of shaped plastics articles for applications in chemical engineeringHOECHST AG·Filed 1985·Granted Oct 14, 1986·6 cites·5 claims
- 2131US5047558AProcess for the preparation of a dioxane adduct of 2-hydroxynaphthalene-6-carboxylic acidHOECHST AG·Filed 1990·Granted Sep 10, 1991·0 cites·4 claims
- 2230US4923485AProcess for separating organic constituents from waste gases of the production of aromatic intermediatesHOECHST AG·Filed 1988·Granted May 8, 1990·5 cites·22 claims
- 2329US5081263ADioxane adducts of aromatic meta- or para-hydroxy-carboxlic acidsHOECHST AG·Filed 1989·Granted Jan 14, 1992·1 cites·10 claims
- 2425US4814518AProcess for extracting nitrohydroxyaromatics from aqueous solutionsHOECHST AG·Filed 1987·Granted Mar 21, 1989·4 cites·16 claims
- 2523US4864065AProcess for removing halogenated hydroxyaromatics from aqueous solutionsHOECHST AG·Filed 1988·Granted Sep 5, 1989·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →