Inventor · disambiguated record
John W. Sparapany
Also filed as: SPARAPANY JOHN · SPARAPANY JOHN W
15 granted patents·468 citations·filing 1988–2002
95Inventor score
Top patents by PatentIndex Score
15 records- 0191US5346627AMethod for removing metals from a fluid streamNALCO CHEMICAL CO·Filed 1993·Granted Sep 13, 1994·83 cites·23 claims
- 0290US5164095ADithiocarbamate polymersNALCO CHEMICAL CO·Filed 1992·Granted Nov 17, 1992·89 cites·3 claims
- 0387US5179173AAminoalkylphosphinates and phosphinic acid-containing polymers therefromNALCO CHEMICAL CO·Filed 1991·Granted Jan 12, 1993·61 cites·6 claims
- 0483US6398967B2Method of clarifying water using low molecular weight cationic dispersion polymersNALCO CHEMICAL CO·Filed 2000·Granted Jun 4, 2002·21 cites·9 claims
- 0577US6517677B1Method of improving retention and drainage in a papermaking process using low molecular weight cationic dispersion polymersONDEO NALCO CO·Filed 2002·Granted Feb 11, 2003·14 cites·5 claims
- 0675US5938937AHydrophilic dispersion polymers for treating wastewaterNALCO CHEMICAL CO·Filed 1995·Granted Aug 17, 1999·50 cites·10 claims
- 0772US4921904ASuperabsorbent polymersNALCO CHEMICAL CO·Filed 1988·Granted May 1, 1990·22 cites·2 claims
- 0865US6413433B1Method for dewatering of sludgeNALCO CHEMICAL CO·Filed 2000·Granted Jul 2, 2002·16 cites·7 claims
- 0964US6238486B1Detectable cationic flocculant and method of using same in industrial food processesNALCO CHEMICAL CO·Filed 1999·Granted May 29, 2001·18 cites·15 claims
- 1064US4868248APolyhydroxyamic acid polymers from polyacrylic acidsNALCO CHEMICAL CO·Filed 1989·Granted Sep 19, 1989·15 cites·2 claims
- 1156US5338816AHydrophobic polyelectrolytes used in removing colorNALCO CHEMICAL CO·Filed 1993·Granted Aug 16, 1994·15 cites·18 claims
- 1254US5283306AHydrophobic polyelectrolytes used in removing colorNALCO CHEMICAL CO·Filed 1992·Granted Feb 1, 1994·13 cites·11 claims
- 1351US5137641ACationic polymers for sludge dewateringNALCO CHEMICAL CO·Filed 1991·Granted Aug 11, 1992·17 cites·5 claims
- 1451US5093413ACationic polymers for sludge dewateringNALCO CHEMICAL CO·Filed 1991·Granted Mar 3, 1992·19 cites·17 claims
- 1546US5143622APhosphinic acid-containing polymers and their use in preventing scale and corrosionNALCO CHEMICAL CO·Filed 1991·Granted Sep 1, 1992·15 cites·5 claims
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