Inventor · disambiguated record
Donald A. Johnson
Also filed as: JOHNSON DONALD · JOHNSON DONALD A · JOHNSON DONALD E · JOHNSON DONALD L
42 granted patents·8 pending applications·2,051 citations·filing 1980–2022
98Inventor score
Top patents by PatentIndex Score
50 records- 0197US4801388AModified acrylamide polymers used as scale inhibitorsNALCO CHEMICAL CO·Filed 1986·Granted Jan 31, 1989·117 cites·9 claims
- 0296US4992380AContinuous on-stream monitoring of cooling tower waterNALCO CHEMICAL CO·Filed 1988·Granted Feb 12, 1991·148 cites·20 claims
- 0395US4929425ACooling water corrosion inhibition methodNALCO CHEMICAL CO·Filed 1988·Granted May 29, 1990·68 cites·12 claims
- 0495US4898686AZinc stabilization with modified acrylamide based polymers and corrosion inhibition derived therefromNALCO CHEMICAL CO·Filed 1987·Granted Feb 6, 1990·65 cites·9 claims
- 0594US4800492AData logger for a post-mix beverage dispensing systemCOCA COLA CO·Filed 1987·Granted Jan 24, 1989·189 cites·12 claims
- 0693US4923634ACooling water corrosion inhibition methodNALCO CHEMICAL CO·Filed 1988·Granted May 8, 1990·59 cites·9 claims
- 0793US4752443ACooling water corrosion inhibition methodNALCO CHEMICAL CO·Filed 1986·Granted Jun 21, 1988·67 cites·6 claims
- 0893US4642194AMethod for prevention of phosphonate decomposition by chlorineNALCO CHEMICAL CO·Filed 1985·Granted Feb 10, 1987·81 cites·4 claims
- 0992US6669904B1Stabilized bromine solutions, method of making and uses thereof for biofouling controlONDEO NALCO CO·Filed 2001·Granted Dec 30, 2003·61 cites·20 claims
- 1092US5716621ANonocclusive drug delivery device and process for its manufacturePHARMADYN INC·Filed 1996·Granted Feb 10, 1998·153 cites·4 claims
- 1192US5298745AMultilayer multipoleHEWLETT PACKARD CO·Filed 1992·Granted Mar 29, 1994·74 cites·25 claims
- 1289US5589106ACarbon steel corrosion inhibitorsNALCO CHEMICAL CO·Filed 1995·Granted Dec 31, 1996·78 cites·11 claims
- 1386US4966711ATransition metals as treatment chemical tracersNALCO CHEMICAL CO·Filed 1989·Granted Oct 30, 1990·46 cites·28 claims
- 1486US4711724AMethod for prevention of phosphonate decomposition by chlorineNALCO CHEMICAL CO·Filed 1986·Granted Dec 8, 1987·52 cites·2 claims
- 1583US7632412B2Method for chemistry control in cooling systemsNALCO CO·Filed 2006·Granted Dec 15, 2009·11 cites·7 claims
- 1683US5891463ANonocclusive drug delivery device and process for its manufactureU S DERMATOLOGICS INC·Filed 1997·Granted Apr 6, 1999·65 cites·17 claims
- 1783US5505958ATransdermal drug delivery device and method for its manufactureALGOS PHARM CORP·Filed 1994·Granted Apr 9, 1996·212 cites·19 claims
- 1882US10190222B2Corrosion inhibitorsECOLAB USA INC·Filed 2016·Granted Jan 29, 2019·2 cites·20 claims
- 1981US6250140B1Method for measuring the rate of a fouling reaction induced by heat transfer using a piezoelectric microbalanceNALCO CHEMICAL CO·Filed 1999·Granted Jun 26, 2001·63 cites·29 claims
- 2081US4919821AModified maleic anhydride polymers and the like for use as scale inhibitorsNALCO CHEMICAL CO·Filed 1988·Granted Apr 24, 1990·47 cites·6 claims
- 2177US5599557AStable hydrated cephalosporin dry powder for oral suspension formulationSCHERING CORP·Filed 1993·Granted Feb 4, 1997·41 cites·14 claims
- 2277US5085794AOligomer containing phosphinate compositions and their method of manufactureNALCO CHEMICAL CO·Filed 1990·Granted Feb 4, 1992·46 cites·3 claims
- 2377US4756881AComposition of corrosion inhibitors for cooling water systems using chemically modified acrylamide or methacrylamide polymersNALCO CHEMICAL CO·Filed 1986·Granted Jul 12, 1988·22 cites·9 claims
- 2474US9771336B2Tetrazole based corrosion inhibitorsECOLAB USA INC·Filed 2014·Granted Sep 26, 2017·2 cites·6 claims
- 2568US7968007B2Tungstate based corrosion inhibitorsNALCO CO·Filed 2008·Granted Jun 28, 2011·3 cites·8 claims
- 2668US5466297AProcess for removal of primarily iron oxide depositsNALCO CHEMICAL CO·Filed 1992·Granted Nov 14, 1995·32 cites·8 claims
- 2768US5415783AMethod for using ozone in cooling towersNALCO CHEMICAL CO·Filed 1993·Granted May 16, 1995·31 cites·11 claims
- 2867US5647995AMethod for the control of calcium carbonate scale using compounds prepared from acetylenic compounds and inorganic phosphite salts and their derivativesNALCO CHEMICAL CO·Filed 1994·Granted Jul 15, 1997·27 cites·6 claims
- 2966US5571079AWound dressingALGOS PHARM CORP·Filed 1994·Granted Nov 5, 1996·92 cites·10 claims
- 3066US5200106ACompositions comprising transition metals for treating and monitoring liquid systemsNALCO CHEMICAL CO·Filed 1990·Granted Apr 6, 1993·27 cites·28 claims
- 3164US10899721B2Tetrazole based corrosion inhibitorsECOLAB USA INC·Filed 2017·Granted Jan 26, 2021·0 cites·7 claims
- 3263US7402263B2Tungstate based corrosion inhibitorsNALCO CO·Filed 2005·Granted Jul 22, 2008·1 cites·18 claims
- 3362US4292293AMethod for the oxidation of water-soluble sulfide compounds to higher oxidation statesNALCO CHEMICAL CO·Filed 1980·Granted Sep 29, 1981·23 cites·11 claims
- 3460US11572628B2Process and method for reducing metal corrosion in waterECOLAB USA INC·Filed 2018·Granted Feb 7, 2023·0 cites·9 claims
- 3560US4904413ACooling water corrosion control method and compositionNALCO CHEMICAL CO·Filed 1988·Granted Feb 27, 1990·12 cites·3 claims
- 3654US2007051735A1Weighted Beverage Holder for Hydration and ExerciseTAYLOR BEVERLEY M·Filed 2005·Application pending·0 cites
- 3754US2003139966A1Advertisement delivery for streaming programFiled 2002·Application pending·0 cites
- 3852US2009277841A1Method for minimizing corrosion, scale, and water consumption in cooling tower systemsJOHNSON DONALD A·Filed 2008·Application pending·0 cites
- 3951US2024368769A1Nonferrous metal corrosion inhibitors and methods of using sameSOLUGEN INC·Filed 2022·Application pending·0 cites
- 4049US2024425990A1Corrosion inhibitors for copper and other yellow metals and methods of using sameSOLUGEN INC·Filed 2022·Application pending·0 cites
- 4145US5503775AMethod of preventing yellow metal corrosion in aqueous systems with superior corrosion performance in reduced environmental impactNALCO CHEMICAL CO·Filed 1994·Granted Apr 2, 1996·14 cites·18 claims
- 4244US2023061502A1Protective compositions for use in systems comprising industrial waterSOLUGEN INC·Filed 2021·Application pending·0 cites
- 4342US2009007616A1Method of inhibiting corrosion on ferrous metal surfaces in contact with nitrogen fertilizer solutionsBUREMAN PHILLIP E·Filed 2007·Application pending·0 cites
- 4437US2012013922A1Print Data Format Modification MechanismLOTZ MICHAEL G·Filed 2010·Application pending·0 cites
- 4536US5797660AAutomotive wire spoke wheelsFiled 1996·Granted Aug 25, 1998·6 cites·33 claims
- 4631US5783728APhosphinate compounds prepared from acetylenic compounds and inorganic phosphite salts and derivatives of these compoundsNALCO CHEMICAL CO·Filed 1997·Granted Jul 21, 1998·3 cites·24 claims
- 4731US5049310AZinc stabilization with modified acrylamide based polymers and corrosion inhibition derived therefromNALCO CHEMICAL CO·Filed 1989·Granted Sep 17, 1991·3 cites·11 claims
- 4831US4728436AAnionic polymers containing 3-acrylamido-3-methylbutanoic acid as scale inhibitors for preventing or reducing calcium phosphate and other scalesNALCO CHEMICAL CO·Filed 1987·Granted Mar 1, 1988·2 cites·2 claims
- 4930US4973428AZinc stabilization with modified acrylamide based polymers and corrosion inhibition derived therefromNALCO CHEMICAL CO·Filed 1989·Granted Nov 27, 1990·0 cites·11 claims
- 5029US4434059APolymers for prevention of fouling by iron oxides in cooling systemsJOHNSON DONALD A·Filed 1982·Granted Feb 28, 1984·6 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →