Inventor · disambiguated record
David Fischer
Also filed as: FISCHER DAVID · FISCHER DAVID A
58 granted patents·5 pending applications·1,813 citations·filing 1979–2021
99Inventor score
Files withBASF AG19BASELL POLYOLEFINE GMBH9Q E D ENV SYSTEMS INC9QED ENVIRONMENTAL SYSTEMS INC6ROEMHELD GMBH3
Top patents by PatentIndex Score
63 records- 0197US9062536B2Devices and methods for landfill gas well monitoring and controlQ E D ENVIRONMENTAL SYSTEMS INC·Filed 2013·Granted Jun 23, 2015·78 cites·20 claims
- 0296US10029291B2Devices and methods for landfill gas well monitoring and controlQ E D ENV SYSTEMS INC·Filed 2015·Granted Jul 24, 2018·15 cites·19 claims
- 0396US7101940B2Chemical compound, method for the production thereof and its use in catalyst systems for producing polyolefinsBASELL POLYOLEFINE GMBH·Filed 2000·Granted Sep 5, 2006·123 cites·14 claims
- 0495US7569651B2Transition metal compound, ligand system, catalyst system and its use for the polymerization and copolymerization of olefinsBASELL POLYPROPYLEN GMBH·Filed 2005·Granted Aug 4, 2009·49 cites·16 claims
- 0595US7342078B2Transition metal compound, ligand system, catalyst system and the use of the latter for polymerisation and copolymerisation of olefinsBASELL POLYOLEFINE GMBH·Filed 2000·Granted Mar 11, 2008·78 cites·22 claims
- 0695US4308863AExternal fixation deviceACE ORTHOPEDIC MFG·Filed 1979·Granted Jan 5, 1982·275 cites·5 claims
- 0794US6812185B2Preparation of a metal-containing supported catalyst or a supported catalyst component by impregnation of a support materialBASELL POLYOLEFINE GMBH·Filed 2003·Granted Nov 2, 2004·53 cites·15 claims
- 0892US6589905B1Method for producing a supported catalystBASELL POLYOLEFINE GMBH·Filed 1999·Granted Jul 8, 2003·74 cites·6 claims
- 0992US5585509AMetallocene complexes having heterofunctional groups in the cyclopentadienyl systemBASF AG·Filed 1995·Granted Dec 17, 1996·71 cites·4 claims
- 1091US5756608APolymerization process using metallocene complexes in the catalyst systemBASF AG·Filed 1996·Granted May 26, 1998·59 cites·1 claims
- 1188US10144043B2Devices and methods for landfill gas well monitoring and controlQ E D ENV SYSTEMS INC·Filed 2015·Granted Dec 4, 2018·5 cites·18 claims
- 1288US6508310B1Bladder-type sampling pump controllerQED ENVIRONMENTAL SYSTEMS INC·Filed 2000·Granted Jan 21, 2003·35 cites·20 claims
- 1388US6022935APreparation of polymers of alk-1-enes in the presence of a supported metallocene catalyst system and of antistatic agentBASF AG·Filed 1997·Granted Feb 8, 2000·57 cites·6 claims
- 1488US4450834AExternal fixation deviceACE ORTHOPEDIC MFG·Filed 1981·Granted May 29, 1984·210 cites·5 claims
- 1587US6248829B1Polymers of propeneBASF AG·Filed 1999·Granted Jun 19, 2001·63 cites·14 claims
- 1685US10053955B2System and method for distributed control of multiple wellheadsQ E D ENV SYSTEMS INC·Filed 2015·Granted Aug 21, 2018·5 cites·9 claims
- 1785US5483002APropylene polymers having low-temperature impact strengthBASF AG·Filed 1994·Granted Jan 9, 1996·44 cites·7 claims
- 1884US11448238B2Pneumatic landfill pump cycle counterQ E D ENV SYSTEMS INC·Filed 2020·Granted Sep 20, 2022·2 cites·19 claims
- 1982US6733717B1Injection stretch-blow molded containers made of olefin polymersBASELL POLYOLEFINE GMBH·Filed 1999·Granted May 11, 2004·47 cites·6 claims
- 2081US6265339B1Process for preparing carrier-borne transition metal catalystsBASF AG·Filed 1997·Granted Jul 24, 2001·44 cites·9 claims
- 2179US4727936ARecovery and control system for leachate collectionQ E D ENVIRONMENTAL SYSTEMS IN·Filed 1986·Granted Mar 1, 1988·61 cites·14 claims
- 2278US7128780B2Process for producing building materials from raw paint sludgeDU PONT·Filed 2002·Granted Oct 31, 2006·18 cites·13 claims
- 2378US6350829B1Supported catalyst systemsBASELL POLYOLEFIN GMBH·Filed 1997·Granted Feb 26, 2002·38 cites·17 claims
- 2475US5831106APreparation of bridged metallocene complexesBASF AG·Filed 1996·Granted Nov 3, 1998·19 cites·3 claims
- 2571US6415659B1Method for analyzing purge waterQED ENVIRONMENTAL SYSTEMS INC·Filed 2000·Granted Jul 9, 2002·10 cites·13 claims
- 2670US6308943B1Device for clamping workpiece to a surfaceROEMHELD A GMBH & CO KG·Filed 2000·Granted Oct 30, 2001·17 cites·17 claims
- 2767US6197900B1Preparation of multiphase homo- or copolymers of C2-C10-alk-1-enes in one reaction zoneBASF AG·Filed 1997·Granted Mar 6, 2001·22 cites·8 claims
- 2866US7347255B2Device for detecting water in product-only pump flow streamQED ENVIRONMENTAL SYSTEMS INC·Filed 2005·Granted Mar 25, 2008·4 cites·9 claims
- 2965US11560786B2Liquid level sensor systemQ E D ENV SYSTEMS INC·Filed 2018·Granted Jan 24, 2023·1 cites·16 claims
- 3060US6583253B1Propene terpolymers with a low extractable portionBASELL POLYOLEFINE GMBH·Filed 1999·Granted Jun 24, 2003·15 cites·11 claims
- 3159US5627246ASupported metallocene complexes having heterofunctional groups in the cyclopentadienyl system as catalyst systemsBASF AG·Filed 1995·Granted May 6, 1997·18 cites·4 claims
- 3259US5238060ASampling pump with packerOED ENVIRONMENTAL SYSTEMS INC·Filed 1992·Granted Aug 24, 1993·22 cites·16 claims
- 3358US6444764B1Supported catalyst system for polymerizing alk-1-enesBASELL POLYOLEFINE GMBH·Filed 1998·Granted Sep 3, 2002·14 cites·19 claims
- 3457US6100353ASupported metallocene catalyst systemsBASF AG·Filed 1995·Granted Aug 8, 2000·14 cites·9 claims
- 3557US4923458ASurgical fixation pin tension adjusterACE MEDICAL CO·Filed 1986·Granted May 8, 1990·52 cites·2 claims
- 3656US6326444B2Preparation of polymers of alkenes by suspension polymerizationBASELL POLYOLEFIN GMBH·Filed 1997·Granted Dec 4, 2001·13 cites·11 claims
- 3755US11910573B2Mechanical device for cooling an electronic componentMELLANOX TECHNOLOGIES LTD·Filed 2021·Granted Feb 20, 2024·0 cites·15 claims
- 3853US5457171ACatalyst systems for the polymerization of C2 -C10 -alkenesBASF AG·Filed 1993·Granted Oct 10, 1995·9 cites·5 claims
- 3950US6456201B1Method and apparatus for measuring groundwater levelsQED ENVIRONMENTAL SYSTEMS INC·Filed 2000·Granted Sep 24, 2002·13 cites·23 claims
- 4049US6562478B1Sealable multilayer film made of a grafted terpolymerBASELL POLYOLEFINE GMBH·Filed 1999·Granted May 13, 2003·13 cites·12 claims
- 4146US2020309114A1Poppet valve for fluid pumpQ E D ENV SYSTEMS INC·Filed 2018·Application pending·0 cites
- 4243US5301749ADual pump floating layer recovery apparatusQED ENVIRONMENTAL SYSTEMS INC·Filed 1992·Granted Apr 12, 1994·9 cites·15 claims
- 4343US2020334515A1Fluid pump for groundwater wells with cycle counterQ E D ENV SYSTEMS INC·Filed 2018·Application pending·0 cites
- 4442US10272356B2Air stripper system and methodQ E D ENV SYSTEMS INC·Filed 2017·Granted Apr 30, 2019·0 cites·7 claims
- 4542US6783310B2Self-centering elementROMHELD GMBH & CO KG A·Filed 2002·Granted Aug 31, 2004·3 cites·9 claims
- 4642US5259450AVented packer for sampling wellQED ENVIRONMENTAL SYSTEMS INC·Filed 1992·Granted Nov 9, 1993·16 cites·12 claims
- 4740US2005109994A1Liquid sprayable flame resistant coatings composition and method of use thereofFiled 2004·Application pending·0 cites
- 4839US10307805B2Landfill gas wellhead cap assemblyQ E D ENV SYSTEMS INC·Filed 2015·Granted Jun 4, 2019·0 cites·21 claims
- 4939US2018371513A1Production of Anthocyanin from Simple SugarsEVOLVA SA·Filed 2016·Application pending·0 cites
- 5038US6433110B1Process for producing alkene polymers by gas phase polymerisationBASELL POLYOLEFINE GMBH·Filed 1997·Granted Aug 13, 2002·4 cites·11 claims
Showing the top 50 of 63 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →