Inventor · disambiguated record
Paul Stahlhofen
Also filed as: STAHLHOFEN PAUL
34 granted patents·779 citations·filing 1974–1991
98Inventor score
Top patents by PatentIndex Score
34 records- 0190US5070001ALight-sensitive mixture for producing positive or negative relief copiesHOECHST AG·Filed 1987·Granted Dec 3, 1991·75 cites·9 claims
- 0290US4576901AProcess for producing negative copies by means of a material based on 1,2-quinone diazides with 4-ester or amide substitutionHOECHST AG·Filed 1984·Granted Mar 18, 1986·54 cites·11 claims
- 0389US4581321AProcess for producing negative copies in a material based on 1,2-quinone diazides with thermal curing agentHOECHST AG·Filed 1984·Granted Apr 8, 1986·50 cites·12 claims
- 0489US4404272ALight-sensitive mixture and copying material prepared therefrom with novolak having brominated phenol unitsHOECHST AG·Filed 1982·Granted Sep 13, 1983·50 cites·4 claims
- 0588US4642282ALight-sensitive positive copying material with alkali soluble polycondensation binderHOECHST AG·Filed 1984·Granted Feb 10, 1987·48 cites·19 claims
- 0688US4387152ALight-sensitive mixture and copying material prepared therefrom, and process for the preparation of a printing form from the copying materialHOECHST AG·Filed 1981·Granted Jun 7, 1983·45 cites·20 claims
- 0786US4594306ALight-sensitive copying material with o-quinone diazide and phenolic hydroxy compoundHOECHST AG·Filed 1984·Granted Jun 10, 1986·24 cites·3 claims
- 0886US3969118ALight-sensitive o-quinone diazide containing copying layerHOECHST AG·Filed 1974·Granted Jul 13, 1976·36 cites·3 claims
- 0983US4275139ALight-sensitive mixture and copying material produced therefromHOECHST AG·Filed 1979·Granted Jun 23, 1981·29 cites·6 claims
- 1082US4786581AGumming solution for use in the burning-in of offset-printing plates comprising water, a hydrophilic polymer and an organic acid derivativeHOECHST AG·Filed 1987·Granted Nov 22, 1988·40 cites·5 claims
- 1181US5149613AProcess for producing images on a photosensitive materialHOECHST AG·Filed 1989·Granted Sep 22, 1992·22 cites·20 claims
- 1279US4407926ALight-sensitive mixture comprising O-naphthoquinone-diazides and light sensitive copying material prepared therefromHOECHST AG·Filed 1981·Granted Oct 4, 1983·28 cites·35 claims
- 1376US5008175ACopying materialsHOECHST CELANESE CORP·Filed 1990·Granted Apr 16, 1991·31 cites·14 claims
- 1475US4458000ALight-sensitive mixture and light-sensitive copying material prepared therefrom wherein image produced therein is visible under yellow safety lightHOECHST AG·Filed 1982·Granted Jul 3, 1984·25 cites·11 claims
- 1574US4889789APhotosensitive composition and photosensitive copying material prepared therefrom wherein composition has a thermal crosslinking urethane formaldehyde condensateHOECHST AG·Filed 1988·Granted Dec 26, 1989·33 cites·6 claims
- 1672US4160671APhotosensitive compositionHOECHST AG·Filed 1977·Granted Jul 10, 1979·19 cites·6 claims
- 1767US4439511ALight-sensitive mixture based on O-naphthoquinone diazide ester of condensate of bisphenol and formaldehyde and light-sensitive copying material prepared therefromHOECHST AG·Filed 1982·Granted Mar 27, 1984·17 cites·14 claims
- 1864US4889788APhotosensitive composition, photosensitive copying material prepared from this composition with thermal hardening symmetric triazine alkyl(aryl)-etherHOECHST AG·Filed 1988·Granted Dec 26, 1989·14 cites·5 claims
- 1957US5084372AProcess for preparing photographic elements utilizing light-sensitive layer containing cyclical acid amide thermo-crosslinking compoundHOECHST CELANESE CORP·Filed 1991·Granted Jan 28, 1992·14 cites·20 claims
- 2056US4560636ALight-sensitive, positive-working copying material having a rough surface provided by pigments in light-sensitive layerHOECHST AG·Filed 1984·Granted Dec 24, 1985·12 cites·4 claims
- 2156US4266000APhotosensitive copying compositionHOECHST AG·Filed 1978·Granted May 5, 1981·11 cites·9 claims
- 2255US4163672APhotosensitive compositionHOECHST AG·Filed 1977·Granted Aug 7, 1979·11 cites·7 claims
- 2352US5225310APhotosensitive mixture containing an ester or amide of 1,2-naphthoquinone diazide sulfonic or carboxylic acid, a phenolic binder resin and a bis-(4-hydroxyphenyl) speed enhancing compoundHOECHST AG·Filed 1988·Granted Jul 6, 1993·10 cites·19 claims
- 2451US5017462AProcess of producing negative relief copies utilizing photosensitive copying material with thermal hardening triazine compoundHOECHST AG·Filed 1989·Granted May 21, 1991·13 cites·7 claims
- 2551US4457999ALight-sensitive 1,2 quinone diazide containing mixture and light-sensitive copying material prepared therefrom wherein imaged produced therein is visible under yellow safety lightHOECHST AG·Filed 1982·Granted Jul 3, 1984·10 cites·9 claims
- 2650US4628020ALight-sensitive compound mixture and copying material comprising o-naphthquinonediazide compoundHOECHST AG·Filed 1982·Granted Dec 9, 1986·9 cites·10 claims
- 2750US4517275ALight-sensitive mixture based on O-naphthoquinone-diazides, and light-sensitive copying material prepared therefromHOECHST AG·Filed 1982·Granted May 14, 1985·9 cites·5 claims
- 2850US4409314ALight-sensitive compounds, light-sensitive mixture, and light-sensitive copying material prepared therefromHOECHST AG·Filed 1981·Granted Oct 11, 1983·9 cites·15 claims
- 2947US4983478ABurn-in gumming composition for offset printing platesHOECHST AG·Filed 1989·Granted Jan 8, 1991·8 cites·17 claims
- 3044US4639406ALight-sensitive compound, light-sensitive mixture, and light-sensitive copying material prepared therefrom with 0-naphthoquinone diazide compoundHOECHST AG·Filed 1981·Granted Jan 27, 1987·7 cites·7 claims
- 3143US4717640ALight-sensitive mixture, recording material prepared therefrom and process for use thereofHOECHST AG·Filed 1985·Granted Jan 5, 1988·8 cites·15 claims
- 3238US4885230ABurn-in gumming composition for offset printing platesHOECHST AG·Filed 1988·Granted Dec 5, 1989·4 cites·4 claims
- 3336US4990429AProcess for the production of negative relief copies utilizing reversal processingHOECHST AG·Filed 1989·Granted Feb 5, 1991·3 cites·13 claims
- 3431US5143815ALight-sensitive mixture based on 1,2-naphthoquinone-diazides, and reproduction material produced with this mixtureHOECHST AG·Filed 1988·Granted Sep 1, 1992·1 cites·10 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →