Inventor · disambiguated record
Friedrich Engelhardt
Also filed as: ENGELHARDT FRIEDRICH · ENGELHARDT FRIEDRICH J · WECKLER GERHARD
59 granted patents·1 pending application·1,705 citations·filing 1974–2009
99Inventor score
Top patents by PatentIndex Score
60 records- 0198US6414214B1Mechanically stable hydrogel-forming polymersBASF AG·Filed 1999·Granted Jul 2, 2002·248 cites·29 claims
- 0296US4309523AWater-soluble copolymer of acrylamidomethylpropanesulfonic acids saltsCASSELLA FARBWERKE MAINKUR AG·Filed 1980·Granted Jan 5, 1982·83 cites·4 claims
- 0395US5331059AHydrophilic, highly swellable hydrogelsCASSELLA FARBWERKE MAINKUR AG·Filed 1992·Granted Jul 19, 1994·203 cites·23 claims
- 0491US4237243AUse of cross-linked polymers to increase the viscosity in cosmetic, pharmaceutical and technical compositionsHOECHST AG·Filed 1979·Granted Dec 2, 1980·88 cites·8 claims
- 0591US4167395AWater-soluble branched polyestersCASSELLA FARBWERKE MAINKUR AG·Filed 1977·Granted Sep 11, 1979·49 cites·11 claims
- 0691US4048077AAqueous clay base mud for deep drillingHOECHST AG·Filed 1975·Granted Sep 13, 1977·64 cites·4 claims
- 0788US4500437AWater soluble copolymers for use in fracture-acidizing of wellsCASSELLA FARBWERKE MAINKUR AG·Filed 1982·Granted Feb 19, 1985·48 cites·9 claims
- 0888US4471097AWater soluble copolymers containing vinyl imidazole as drilling fluid additivesUHL KLAUS·Filed 1982·Granted Sep 11, 1984·72 cites·6 claims
- 0988US4101274AProcess for the level dyeing of synthetic fiber materialsHOECHST AG·Filed 1976·Granted Jul 18, 1978·19 cites·17 claims
- 1087US6300423B1Process for modifying hydrophilic polymersCASSELLA AG·Filed 1994·Granted Oct 9, 2001·53 cites·12 claims
- 1186US7132479B2Polymer mixtures with improved odor controlBASF AG·Filed 2003·Granted Nov 7, 2006·25 cites·12 claims
- 1283US7842741B2Stabilized aqueous polymer compositionsALLESSA CHEMIE GMBH·Filed 2009·Granted Nov 30, 2010·10 cites·37 claims
- 1383US5011892AHydrophilic swellable graft copolymers, their preparation and useCASSELLA AG·Filed 1990·Granted Apr 30, 1991·38 cites·14 claims
- 1482US5041496AHydrophilic, swellable graft copolymers, their preparation and useCASSELLA AG·Filed 1990·Granted Aug 20, 1991·40 cites·17 claims
- 1582US4749758AProcess for the preparation of copolymers of vinylphosphonic acid and (meth) acrylic acid in aqueous solutionHOECHST AG·Filed 1986·Granted Jun 7, 1988·34 cites·7 claims
- 1681US4357245AWater-soluble copolymer and its preparationCASSELLA FARBWERKE MAINKUR AG·Filed 1981·Granted Nov 2, 1982·30 cites·2 claims
- 1780US4587283ACement slurries for deep holes, with a copolymer content for reducing the water lossHOECHST AG·Filed 1985·Granted May 6, 1986·36 cites·4 claims
- 1880US4507440ACross-linkable and cross linked macromolecular compositions wherein cross-linking is by structural bridges of the formula --NRx --CH═N--CO-- and their preparationCASSELLA FARBWERKE MAINKUR AG·Filed 1982·Granted Mar 26, 1985·28 cites·26 claims
- 1980US4150216AHair-treating agents from branched, sulfo-group containing copolyestersHOECHST AG·Filed 1977·Granted Apr 17, 1979·35 cites·23 claims
- 2079US5066745AAlkenylphosphonic and --phosphinic acid esters, process for their preparation, hydrogels produced using them, and their useCASSELLA FARBWERKE MAINKUR AG·Filed 1990·Granted Nov 19, 1991·18 cites·3 claims
- 2179US4959441AAlkenylphosphonic and -phosphinic acid esters, process for their preparation, hydrogels produced using them, and their useCASSELLA FARBWERKE MAINKUR AG·Filed 1989·Granted Sep 25, 1990·12 cites·2 claims
- 2277US8962715B2Stabilized aqueous polymer compositions and their useENGELHARDT FRIEDRICH·Filed 2009·Granted Feb 24, 2015·7 cites·23 claims
- 2377US6602950B1Hydrophilic hydrogels with a high swelling capacity and method for producing and using themBASF AG·Filed 1999·Granted Aug 5, 2003·58 cites·23 claims
- 2474US7662460B2Plasticized superabsorbent polymer sheets and use thereof in hygienic articlesBASF AG·Filed 2003·Granted Feb 16, 2010·16 cites·24 claims
- 2573US5489647AHydrophilic, swellable graft polymersCASSELLA FARBWERKE MAINKUR AG·Filed 1992·Granted Feb 6, 1996·24 cites·13 claims
- 2673US4931497AHydrophilic swellable graft polymers from maleic anhydride-alkylene substrateCASSELLA FARBWERKE MAINKUR AG·Filed 1988·Granted Jun 5, 1990·27 cites·6 claims
- 2773US4743666AWater-soluble copolymers with pendant phosphonic, sulphonic and amide groupsCASSELLA FARBWERKE MAINKUR AG·Filed 1986·Granted May 10, 1988·17 cites·3 claims
- 2870US4722958AProcess for the preparation of copolymersCASSELLA FARBWERKE MAINKUR AG·Filed 1987·Granted Feb 2, 1988·39 cites·8 claims
- 2970US4451631AAgent and method for deoiling sand and rock massesCASSELLA FARBWERKE MAINKUR AG·Filed 1982·Granted May 29, 1984·16 cites·9 claims
- 3069US4696987AProcess for the preparation of polymers of vinylphosphonic acid in protic solventsHOECHST AG·Filed 1983·Granted Sep 29, 1987·15 cites·6 claims
- 3166US4794166AProcess for the preparation of a hydrogel which is largely free from monomersCASSELLA FARBWERKE MAINKUR AG·Filed 1987·Granted Dec 27, 1988·16 cites·14 claims
- 3266US4518745AMetal chelates of water soluble copolymersCASSELLA FARBWERKE MAINKUR AG·Filed 1983·Granted May 21, 1985·21 cites·6 claims
- 3365US4736014AWater-soluble polycoesters, process for their preparation, and their useCASSELLA FARBWERKE MAINKUR AG·Filed 1985·Granted Apr 5, 1988·14 cites·11 claims
- 3464US4314052APolyester which is soluble or dispersible in water, a process for its preparation and its use as a levelling auxiliary, levelling auxiliaries and processes for uniform dyeingCASSELLA FARBWERKE MAINKUR AG·Filed 1980·Granted Feb 2, 1982·11 cites·15 claims
- 3560US4551513AWater soluble copolymersCASSELLA FARBWERKE MAINKUR AG·Filed 1984·Granted Nov 5, 1985·12 cites·17 claims
- 3660US4250296ALevelling agent and process for the even dyeing of materials made of synthetic fibersCASSELLA AG·Filed 1978·Granted Feb 10, 1981·13 cites·11 claims
- 3757US4521579AHigh molecular weight water-soluble polymers useful in deoiling sand and rock massesCASSELLA FARBWERKE MAINKUR AG·Filed 1983·Granted Jun 4, 1985·12 cites·5 claims
- 3857US4463165AWater-dispersible polyester, its preparation, and its use as a hydrophiling agentCASSELLA FARBWERKE MAINKUR AG·Filed 1983·Granted Jul 31, 1984·12 cites·14 claims
- 3956US4499232AWater soluble, crosslinkable polymer compositions, their preparation and useCASSELLA FARBWERKE MAINKUR AG·Filed 1982·Granted Feb 12, 1985·16 cites·20 claims
- 4055US4300903APadding auxiliaries and processes for dyeing cellulose fibers or mixtures of cellulose fibers and synthetic fibers with sulphur dyestuffs, sulphur vat dyestuffs, vat dyestuffs and reactive dyestuffsCASSELLA FARBWERKE MAINKUR AG·Filed 1980·Granted Nov 17, 1981·8 cites·11 claims
- 4154US4304569AFormulation for brightening synthetic fibers and its preparation and useCASSELLA AG·Filed 1980·Granted Dec 8, 1981·10 cites·15 claims
- 4253US4252532AProcess for dyeing evenly synthetic fibrous materialsHOECHST AG·Filed 1977·Granted Feb 24, 1981·4 cites·12 claims
- 4352US4237249AProcess for the preparation of crosslinked copolymers, the process products obtained, and their use in textile printingCASSELLA FARBWERKE MAINKUR AG·Filed 1978·Granted Dec 2, 1980·10 cites·8 claims
- 4449US4585845APhosphonic acid cross-linked hydrophilic copolymersCASSELLA FARBWERKE MAINKUR AG·Filed 1984·Granted Apr 29, 1986·25 cites·7 claims
- 4548US4407321ADrag reducing agentsHOECHST AG·Filed 1980·Granted Oct 4, 1983·11 cites·4 claims
- 4648US4323363ADyeing of mixed fibersCASSELLA FARBWERKE MAINKUR AG·Filed 1980·Granted Apr 6, 1982·8 cites·10 claims
- 4743US2003135172A1Absorbent articleFiled 2002·Application pending·0 cites
- 4842US5236965AHydrophilic, swellable polymersCASSELLA FARBWERKE MAINKUR AG·Filed 1993·Granted Aug 17, 1993·17 cites·13 claims
- 4942US5082059AUse of hydrocarbon-rich gels as fracturing fluidsCASSELLA FARBWERKE MAINKUR AG·Filed 1990·Granted Jan 21, 1992·6 cites·5 claims
- 5042US4401836AModified polyvinyl alcohol and its use as a sizing agentHOECHST AG·Filed 1982·Granted Aug 30, 1983·4 cites·4 claims
Showing the top 50 of 60 patent records by PatentIndex Score.
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