Inventor · disambiguated record
Richard Alan Callahan
Also filed as: CALLAHAN RICHARD A · CALLAHAN RICHARD ALAN
16 granted patents·3 pending applications·453 citations·filing 1985–2024
94Inventor score
Top patents by PatentIndex Score
19 records- 0197US5233837AProcess and apparatus for producing liquid carbon dioxideENERFEX INC·Filed 1992·Granted Aug 10, 1993·178 cites·11 claims
- 0295US11149636B2Turbine powered electricity generationCALLAHAN RICHARD ALAN·Filed 2019·Granted Oct 19, 2021·15 cites·33 claims
- 0395US11149634B2Turbine powered electricity generationCALLAHAN RICHARD ALAN·Filed 2019·Granted Oct 19, 2021·14 cites·12 claims
- 0492US11808206B2Tail gas recycle combined cycle power plantCALLAHAN RICHARD ALAN·Filed 2022·Granted Nov 7, 2023·4 cites·19 claims
- 0590US9556404B2Laundry additive and drum treatmentAS Innovations LLC·Filed 2016·Granted Jan 31, 2017·4 cites·23 claims
- 0686US10041022B2Laundry additive and drum treatmentAS Innovations LLC·Filed 2017·Granted Aug 7, 2018·2 cites·23 claims
- 0786US9353333B1Laundry additive and drum treatmentINNOVATIONS LLC AS·Filed 2014·Granted May 31, 2016·7 cites·29 claims
- 0885US5482539AMultiple stage semi-permeable membrane process and apparatus for gas separationENERFEX INC·Filed 1994·Granted Jan 9, 1996·51 cites·11 claims
- 0985US5186941AVesicle formulation for the controlled release of therapeutic agentsVESTAR INC·Filed 1991·Granted Feb 16, 1993·85 cites·9 claims
- 1083US11994063B2Turbine powered electricity generationCALLAHAN RICHARD ALAN·Filed 2019·Granted May 28, 2024·2 cites·11 claims
- 1173US2024318592A1Turbine Powered Electricity GenerationCALLAHAN RICHARD ALAN·Filed 2024·Application pending·0 cites
- 1273US2025003366A1Turbine Powered Electricity GenerationCALLAHAN RICHARD ALAN·Filed 2024·Application pending·0 cites
- 1365US10377970B2Laundry additive and drum treatmentZERO ODOR COMPANY LLC·Filed 2018·Granted Aug 13, 2019·0 cites·23 claims
- 1460US5873928AMultiple stage semi-permeable membrane process and apparatus for gas separationENERFEX INC·Filed 1996·Granted Feb 23, 1999·22 cites·4 claims
- 1558US6128916AMembrane technology to remove non-condensable gases from refrigeration systemsENERFEX INC·Filed 1998·Granted Oct 10, 2000·25 cites·8 claims
- 1653US6953492B2Membrane technology to reduce nitrogen in natural gasENERFEX INC·Filed 2001·Granted Oct 11, 2005·4 cites·5 claims
- 1747US2023340914A1Turbine Powered Electricity GenerationCALLAHAN RICHARD ALAN·Filed 2022·Application pending·0 cites
- 1844US4724845AMethod or systems of determining physiological statusVESTAR INC·Filed 1985·Granted Feb 16, 1988·27 cites·28 claims
- 1941US5693121ASemi-permeable membrane separation process for the production of very high purity nitrogenENERFEX INC·Filed 1995·Granted Dec 2, 1997·13 cites·20 claims
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