Inventor · disambiguated record
Helen T. Ryan
Also filed as: RYAN HELEN · RYAN HELEN T
15 granted patents·6 pending applications·211 citations·filing 1992–2023
92Inventor score
Files withAFTON CHEMICAL CORP9ETHYL PETROLEUM ADDITIVES LTD5RYAN HELEN T3BRENNAN BRENT L1CORBETT PATRICIA M1
Top patents by PatentIndex Score
21 records- 0189US6255263B1Lubricant compositions exhibiting improved demulse performanceETHYL PETROLEUM ADDITIVES LTD·Filed 2000·Granted Jul 3, 2001·34 cites·15 claims
- 0286US6326336B1Turbine oils with excellent high temperature oxidative stabilityETHYL CORP·Filed 1998·Granted Dec 4, 2001·44 cites·22 claims
- 0380US12378494B2Corrosion inhibitor and industrial lubricant including the sameAFTON CHEMICAL CORP·Filed 2023·Granted Aug 5, 2025·0 cites·21 claims
- 0480US6184186B1Lubricating compositionsETHYL PETROLEUM ADDITIVES LTD·Filed 1999·Granted Feb 6, 2001·38 cites·1 claims
- 0579US8227391B2Lubricating composition with good oxidative stability and reduced deposit formationRYAN HELEN T·Filed 2008·Granted Jul 24, 2012·7 cites·11 claims
- 0679US5767045AHydraulic fluidsETHYL PETROLEUM ADDITIVES LTD·Filed 1996·Granted Jun 16, 1998·34 cites·10 claims
- 0776US8962539B2Friction modifiers for slideway applicationsAFTON CHEMICAL CORP·Filed 2013·Granted Feb 24, 2015·2 cites·4 claims
- 0874US5505868AModified dispersant compositionsETHYL PETROLEUM ADDITIVES LTD·Filed 1992·Granted Apr 9, 1996·25 cites·20 claims
- 0970US7759294B2Lubricant compositionsAFTON CHEMICAL CORP·Filed 2003·Granted Jul 20, 2010·10 cites·14 claims
- 1069US11795412B1Lubricating composition for industrial gear fluidsAFTON CHEMICAL CORP·Filed 2023·Granted Oct 24, 2023·0 cites·20 claims
- 1158US2009318319A1Friction modifiers for slideway applicationsAFTON CHEMICAL CORP·Filed 2008·Application pending·0 cites
- 1256US5604188AZinc additives of enhanced performance capabilitiesETHYL PETROLEUM ADDITIVES LTD·Filed 1995·Granted Feb 18, 1997·15 cites·19 claims
- 1354US11149226B2Preparation and use of aminoalkylphosphonic acid dialkyl ester compounds in a lubricant for antiwear, friction reduction, and/or micropitting preventionAFTON CHEMICAL CORP·Filed 2020·Granted Oct 19, 2021·0 cites·13 claims
- 1454US7452851B2Lubricant compositionsAFTON CHEMICAL CORP·Filed 2003·Granted Nov 18, 2008·2 cites·27 claims
- 1553US2015141306A1Friction Modifiers for Slideway ApplicationsAFTON CHEMICAL CORP·Filed 2015·Application pending·0 cites
- 1653US2009291865A1Controlled release of additives in gas turbine lubricating compositionsBRENNAN BRENT L·Filed 2008·Application pending·0 cites
- 1752US8003584B2Lubricant compositionsAFTON CHEMICAL CORP·Filed 2006·Granted Aug 23, 2011·0 cites·21 claims
- 1851US2010009881A1Thermally stable zinc-free antiwear agentRYAN HELEN T·Filed 2008·Application pending·0 cites
- 1948US10563146B2Preparation and use of aminoalkylphosphonic acid dilakyl ester compounds in a lubricant for antiwear, friction reduction, and/or micropitting preventionRYAN HELEN T·Filed 2012·Granted Feb 18, 2020·0 cites·16 claims
- 2044US2008125338A1Food grade lubricant compositionsCORBETT PATRICIA M·Filed 2006·Application pending·0 cites
- 2143US2006252660A1Hydrolytically stable viscosity index improvesDUGGAL AKHILESH·Filed 2005·Application pending·0 cites
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