Assignee
PLUG POWER INC
US·160 granted patents·28 pending applications·4,845 citations·filing 1997–2024
Top patents by PatentIndex Score
188 records- 0197US6280865B1Fuel cell system with hydrogen purification subsystemPLUG POWER INC·Filed 1999·Granted Aug 28, 2001·284 cites·30 claims
- 0296US6500580B1Fuel cell fluid flow plate for promoting fluid servicePLUG POWER INC·Filed 2000·Granted Dec 31, 2002·67 cites·9 claims
- 0396US6219623B1Anti-islanding method and apparatus for distributed power generationPLUG POWER INC·Filed 1998·Granted Apr 17, 2001·563 cites·20 claims
- 0495US6810339B2Anti-islanding method and apparatus for distributed power generationPLUG POWER INC·Filed 2001·Granted Oct 26, 2004·268 cites·30 claims
- 0594US6455181B1Fuel cell system with sensorPLUG POWER INC·Filed 2000·Granted Sep 24, 2002·64 cites·24 claims
- 0694US6372372B1Clamping system for a fuel cell stackPLUG POWER INC·Filed 2000·Granted Apr 16, 2002·80 cites·17 claims
- 0793US11883779B2Method and system for electrochemically compressing gaseous hydrogenPLUG POWER INC·Filed 2021·Granted Jan 30, 2024·2 cites·18 claims
- 0893US6541148B1Manifold system for a fuel cell stackPLUG POWER INC·Filed 2000·Granted Apr 1, 2003·60 cites·7 claims
- 0993US6309769B1Carbon monoxide filter layerPLUG POWER INC·Filed 2000·Granted Oct 30, 2001·68 cites·79 claims
- 1093US6251534B1Fuel cell cascade flow systemPLUG POWER INC·Filed 1999·Granted Jun 26, 2001·66 cites·26 claims
- 1192US6071635AEasily-formable fuel cell assembly fluid flow plate having conductivity and increased non-conductive materialPLUG POWER INC·Filed 1998·Granted Jun 6, 2000·114 cites·85 claims
- 1291US7332236B2Method and apparatus for controlling a combined heat and power fuel cell systemPLUG POWER INC·Filed 2005·Granted Feb 19, 2008·8 cites·10 claims
- 1391US6649293B1Heatable end plate, fuel cell assembly, and method for operating a fuel cell assemblyPLUG POWER INC·Filed 2000·Granted Nov 18, 2003·47 cites·20 claims
- 1491US6492044B1Reactant conditioning for high temperature fuel cellsPLUG POWER INC·Filed 2000·Granted Dec 10, 2002·47 cites·11 claims
- 1591US6110612AStructure for common access and support of fuel cell stacksPLUG POWER INC·Filed 1999·Granted Aug 29, 2000·105 cites·44 claims
- 1690US7416800B2Method and apparatus for a combined fuel cell and hydrogen purification systemPLUG POWER INC·Filed 2006·Granted Aug 26, 2008·14 cites·10 claims
- 1790US6630263B1Fuel cell systems and methodsPLUG POWER INC·Filed 2000·Granted Oct 7, 2003·40 cites·25 claims
- 1890US6410176B1Voltage monitoring system for a fuel cell stackPLUG POWER INC·Filed 2000·Granted Jun 25, 2002·54 cites·50 claims
- 1990US6281684B1Technique and apparatus to measure cell voltages of a fuel cell stack using different ground referencesPLUG POWER INC·Filed 2000·Granted Aug 28, 2001·49 cites·29 claims
- 2090US6066408AFuel cell cooler-humidifier platePLUG POWER INC·Filed 1997·Granted May 23, 2000·103 cites·29 claims
- 2189US7691507B2Combination fuel cell and ion pump, and methods and infrastructure systems employing samePLUG POWER INC·Filed 2007·Granted Apr 6, 2010·13 cites·13 claims
- 2289US6682844B2Release valve and method for venting a systemPLUG POWER INC·Filed 2001·Granted Jan 27, 2004·69 cites·57 claims
- 2389US6174616B1Fuel cell assembly unit for promoting fluid service and design flexibilityPLUG POWER INC·Filed 1998·Granted Jan 16, 2001·81 cites·19 claims
- 2489US6140820AMeasuring cell voltages of a fuel cell stackPLUG POWER INC·Filed 1999·Granted Oct 31, 2000·77 cites·27 claims
- 2588US6939635B2Method and apparatus for controlling a combined heat and power fuel cell systemPLUG POWER INC·Filed 2002·Granted Sep 6, 2005·20 cites·4 claims
- 2688US6410179B1Fluid flow plate having a bridge piecePLUG POWER INC·Filed 2000·Granted Jun 25, 2002·82 cites·15 claims
- 2788US6096450AFuel cell assembly fluid flow plate having conductive fibers and rigidizing material thereinPLUG POWER INC·Filed 1998·Granted Aug 1, 2000·91 cites·24 claims
- 2887US12278410B2Integrated circuit for diagnosticsPLUG POWER INC·Filed 2024·Granted Apr 15, 2025·0 cites·19 claims
- 2987US7141323B2Method and apparatus for electrochemical compression and expansion of hydrogen in a fuel cell systemPLUG POWER INC·Filed 2002·Granted Nov 28, 2006·31 cites·14 claims
- 3087US6835483B2Method and apparatus for controlling a combined heat and power fuel cell systemPLUG POWER INC·Filed 2002·Granted Dec 28, 2004·19 cites·31 claims
- 3187US6761987B2Fuel cell system having an energy source backupPLUG POWER INC·Filed 2001·Granted Jul 13, 2004·29 cites·16 claims
- 3287US6686080B2Fuel cell systemsPLUG POWER INC·Filed 2001·Granted Feb 3, 2004·43 cites·27 claims
- 3387US6514634B1Method and system for humidification of a fuelPLUG POWER INC·Filed 2000·Granted Feb 4, 2003·36 cites·41 claims
- 3486US12508542B2Method and system for electrochemically compressing gaseous hydrogenPLUG POWER INC·Filed 2023·Granted Dec 30, 2025·0 cites·19 claims
- 3586US6406807B1Distribution of hydration fluid in a fuel cellPLUG POWER INC·Filed 2000·Granted Jun 18, 2002·31 cites·7 claims
- 3685US7132182B2Method and apparatus for electrochemical compression and expansion of hydrogen in a fuel cell systemPLUG POWER INC·Filed 2002·Granted Nov 7, 2006·31 cites·30 claims
- 3785US6740437B2Method and apparatus for controlling a combined heat and power fuel cell systemPLUG POWER INC·Filed 2002·Granted May 25, 2004·17 cites·49 claims
- 3885US6589678B1Fuel cell method of operationPLUG POWER INC·Filed 2000·Granted Jul 8, 2003·26 cites·37 claims
- 3985US6261711B1Sealing system for fuel cellsPLUG POWER INC·Filed 1999·Granted Jul 17, 2001·131 cites·21 claims
- 4084US7045233B2Method and apparatus for electrochemical compression and expansion of hydrogen in a fuel cell systemPLUG POWER INC·Filed 2002·Granted May 16, 2006·29 cites·47 claims
- 4184US6881508B2Apparatus and method for controlling a fuel cell systemPLUG POWER INC·Filed 2002·Granted Apr 19, 2005·33 cites·40 claims
- 4284US6784135B2Thermal regulating catalyst compositionPLUG POWER INC·Filed 2003·Granted Aug 31, 2004·44 cites·21 claims
- 4384US6650968B2Technique to regulate an efficiency of a fuel cell systemPLUG POWER INC·Filed 2000·Granted Nov 18, 2003·25 cites·23 claims
- 4484US6498462B2Generator control system to accommodate a decrease in a power grid voltagePLUG POWER INC·Filed 2001·Granted Dec 24, 2002·67 cites·25 claims
- 4584US6451467B1Flow control subsystem for a fuel cell systemPLUG POWER INC·Filed 2000·Granted Sep 17, 2002·29 cites·23 claims
- 4684US6370878B1Recovering heat from fuel cell exhaustPLUG POWER INC·Filed 2000·Granted Apr 16, 2002·32 cites·32 claims
- 4784US6218039B1Clamping apparatus and method for a fuel cellPLUG POWER INC·Filed 1999·Granted Apr 17, 2001·104 cites·22 claims
- 4883US11679339B2High-output atmospheric water generatorPLUG POWER INC·Filed 2018·Granted Jun 20, 2023·15 cites·25 claims
- 4983US11608939B2Support structure for shortened cryogenic transport trailerPLUG POWER INC·Filed 2020·Granted Mar 21, 2023·2 cites·11 claims
- 5083US7264895B2Fuel cell thermal management systemPLUG POWER INC·Filed 2002·Granted Sep 4, 2007·26 cites·21 claims
Showing the top 50 of 188 patent records by PatentIndex Score.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →