Inventor · disambiguated record
Ludwig Hartmann
Also filed as: HARTMANN LUDWIG · HARTMANN LUDWIG A · HARTMANN LUDWIG ALBERT
40 granted patents·945 citations·filing 1972–2001
98Inventor score
Files withICI AMERICA INC15FREUDENBERG CARL FA9FREUDENBERG CARL4LUTRAVIL SPINNVLIES3GRAMMER FORMTEILE GMBH2
Top patents by PatentIndex Score
40 records- 0197US4304234ANon-woven fabrics of polyolefin filament and processes of production thereofFREUDENBERG CARL·Filed 1980·Granted Dec 8, 1981·75 cites·14 claims
- 0296US4363845ASpun non-woven fabrics with high dimensional stability, and processes for their productionFREUDENBERG CARL FA·Filed 1981·Granted Dec 14, 1982·72 cites·19 claims
- 0394US4413032ANon-woven fabric with wick actionFREUDENBERG CARL·Filed 1981·Granted Nov 1, 1983·53 cites·5 claims
- 0492US4473696ASynthesis of 2-substituted-5-methyl-pyridinesICI AMERICA INC·Filed 1982·Granted Sep 25, 1984·25 cites·3 claims
- 0591US5053516ASynthesis of 2-substituted-5-methylpyridines from methylcyclobutanecarbonitrile, valeronitrile and pentenonitrile intermediatesICI AMERICA INC·Filed 1990·Granted Oct 1, 1991·43 cites·5 claims
- 0689US4172166ACarpet with non-woven backingFREUDENBERG CARL FA·Filed 1978·Granted Oct 23, 1979·29 cites·6 claims
- 0785US4153621AGlycidyl ethers derived from 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenylICI AMERICA INC·Filed 1977·Granted May 8, 1979·25 cites·2 claims
- 0885US4072656AGlycidyl ethers derived from 3,3',5,5'-tetraalkyl-4,4'-dihydroxybiphenylICI AMERICA INC·Filed 1976·Granted Feb 7, 1978·27 cites·4 claims
- 0985US4060532AHalogenated dioxolane tranquilizersICI AMERICA INC·Filed 1972·Granted Nov 29, 1977·14 cites·17 claims
- 1084US4496508AMethod for manufacturing polypropylene spun-bonded fabrics with low draping coefficientFREUDENBERG CARL FA·Filed 1982·Granted Jan 29, 1985·27 cites·14 claims
- 1183US6170901B1Covering arrangement such as a soft top for a motor vehicleGRAMMER FORMTEILE GMBH·Filed 2000·Granted Jan 9, 2001·17 cites·2 claims
- 1283US4093763AMultiple-layered non-woven fabricLUTRAVIL SPINNVLIES·Filed 1975·Granted Jun 6, 1978·26 cites·13 claims
- 1382US4578134AProcess for the production of spunbonded fabrics from aerodynamically drawn filamentsHARTMANN LUDWIG·Filed 1984·Granted Mar 25, 1986·24 cites·9 claims
- 1482US4305986ATufted carpetingFREUDENBERG CARL·Filed 1980·Granted Dec 15, 1981·23 cites·8 claims
- 1581US6341810B2Covering arrangement such as a soft top for a motor vehiclePARAT AUTOMOTIVE SCHONENBACH G·Filed 2001·Granted Jan 29, 2002·14 cites·2 claims
- 1681US3975224ADimensionally stable, high-tenacity non-woven webs and processLUTRAVIL SPINNVLIES·Filed 1973·Granted Aug 17, 1976·28 cites·27 claims
- 1778US4156068AHigh molecular weight polyethersulfonesICI AMERICA INC·Filed 1978·Granted May 22, 1979·21 cites·22 claims
- 1877US6260904B1Covering arrangement such as a soft top for a motor vehiclePARAT AUTOMOTIVE SCHONENBACH G·Filed 2000·Granted Jul 17, 2001·10 cites·2 claims
- 1976US6107799ANoise reduction arrangement for a magnetic resonance tomography apparatusSIEMENS AG·Filed 1998·Granted Aug 22, 2000·43 cites·11 claims
- 2076US4902559AAbsorbent body of nonwoven material and a method for the production thereofFREUDENBERG CARL FA·Filed 1988·Granted Feb 20, 1990·109 cites·14 claims
- 2175US4997611AProcess for the production of nonwoven webs including a drawing step and a separate blowing stepFREUDENBERG CARL·Filed 1988·Granted Mar 5, 1991·39 cites·10 claims
- 2275US4584380ASynthesis of 2-substituted-5-methyl-pyridines and intermediates thereforICI AMERICA INC·Filed 1984·Granted Apr 22, 1986·11 cites·14 claims
- 2374US4210690ASpun nonwoven fabric of polyester filaments for use as backing material for a deep-drawable tufted carpetFREUDENBERG CARL FA·Filed 1978·Granted Jul 1, 1980·21 cites·7 claims
- 2469US4842915ATufting base for carpets made of a spunbonded fabric, a method of manufacturing the base, and a tufting carpetHARTMANN LUDWIG·Filed 1987·Granted Jun 27, 1989·38 cites·6 claims
- 2567US6082807ACovering arrangement such as a soft top for a motor vehicleGRAMMER FORMTEILE GMBH·Filed 1998·Granted Jul 4, 2000·19 cites·4 claims
- 2667US3991250ASpunbonded fabrics of nylon-6 filamentsLUTRAVIL SPINNVLIES·Filed 1975·Granted Nov 9, 1976·11 cites·9 claims
- 2762US4414262AShaped body of a settable mineral material with reinforcement fibers embedded thereinFREUDENBERG CARL FA·Filed 1982·Granted Nov 8, 1983·17 cites·10 claims
- 2857US3996376AHalogenated dioxolane tranquilizersICI AMERICA INC·Filed 1975·Granted Dec 7, 1976·3 cites·16 claims
- 2955US4783547APolyfluoroaromatic nitrilesICI AMERICA INC·Filed 1986·Granted Nov 8, 1988·4 cites·2 claims
- 3055US4169176AProcess for the manufacture of heat shaped automobile carpetFREUDENBERG CARL FA·Filed 1978·Granted Sep 25, 1979·11 cites·8 claims
- 3154US4280965APreparation of cyano substituted benzyl estersICI AMERICA INC·Filed 1980·Granted Jul 28, 1981·4 cites·7 claims
- 3253US4714651AElastic roofing and sealing materialsFREUDENBERG CARL FA·Filed 1985·Granted Dec 22, 1987·23 cites·12 claims
- 3353US4687854ABispiperidone precursor of 2-substituted-5-methyl-pyridinesICI AMERICA INC·Filed 1986·Granted Aug 18, 1987·3 cites·1 claims
- 3453US4658031ASynthesis of 2-substituted-5-methyl-pyridines and intermediates thereforICI AMERICA INC·Filed 1985·Granted Apr 14, 1987·3 cites·2 claims
- 3551US4965394ADifunctional polyfluoroaromatic derivatives and a process of preparing the sameICI AMERICA INC·Filed 1989·Granted Oct 23, 1990·3 cites·11 claims
- 3651US4866185ADifunctional polyfluoroaromatic derivatives and a process of preparing the sameICI AMERICA INC·Filed 1988·Granted Sep 12, 1989·3 cites·2 claims
- 3743US4753698AMethod for the production of spun bonded nonwoven fabrics having a uniform structureFREUDENBERG CARL FA·Filed 1986·Granted Jun 28, 1988·11 cites·14 claims
- 3840US5108276AApparatus for the production of spunbonded fabricsFREUDENBERTG CARL·Filed 1990·Granted Apr 28, 1992·12 cites·1 claims
- 3938US4073802AProcess for the preparation and purification of 3-(4-lithiosulfophenoxy)-1,2-propanediolICI AMERICA INC·Filed 1976·Granted Feb 14, 1978·1 cites·8 claims
- 4033US4100063AMethod and apparatus for the biological cleansing of waste waterGEIGER MASCHF HELMUT·Filed 1976·Granted Jul 11, 1978·3 cites·7 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →