Inventor · disambiguated record
Prasad Y. Duggirala
Also filed as: DUGGIRALA PRASAD · DUGGIRALA PRASAD Y · DUGGIRALA PRASAD YOGENDRA
36 granted patents·22 pending applications·294 citations·filing 1998–2024
97Inventor score
Top patents by PatentIndex Score
58 records- 0198US7985318B2Method of monitoring and inhibiting scale deposition in pulp mill evaporators and concentratorsNALCO CO·Filed 2007·Granted Jul 26, 2011·38 cites·15 claims
- 0295US8366877B2Lipohydrophilic glycerol based polymers as digestion aids for improving wood pulping processesNALCO CO·Filed 2010·Granted Feb 5, 2013·14 cites·13 claims
- 0395US8262852B2Method for improving fiber quality and process efficiency in mechanical pulpingDUGGIRALA PRASAD Y·Filed 2010·Granted Sep 11, 2012·12 cites·15 claims
- 0494US8246780B2Methods for enhancing brightness and resistance to thermal yellowing of bleached kraft pulp and paperDUGGIRALA PRASAD·Filed 2006·Granted Aug 21, 2012·15 cites·25 claims
- 0590US6375829B1Method and apparatus for measuring scaling capacity of calcium oxalate solutions using an electrochemically controlled pH change in the solution proximate to a piezoelectric microbalanceNALCO CHEMICAL CO·Filed 2000·Granted Apr 23, 2002·41 cites·23 claims
- 0688US8262858B2Compositions and processes for paper productionDUGGIRALA PRASAD Y·Filed 2011·Granted Sep 11, 2012·14 cites·17 claims
- 0788US7914646B2Compositions and processes for paper productionNALCO CO·Filed 2006·Granted Mar 29, 2011·10 cites·15 claims
- 0887US8858759B1Enhancement of sheet dewatering using soy flour or soy proteinECOLAB USA INC·Filed 2013·Granted Oct 14, 2014·12 cites·15 claims
- 0987US8092649B2Method of decreasing the rate of photoyellowing with thiocyanic acidSHEVCHENKO SERGEY M·Filed 2005·Granted Jan 10, 2012·9 cites·19 claims
- 1086US8133351B2Deinking a cellulosic substrate using magnesium hydroxideDUGGIRALA PRASAD Y·Filed 2008·Granted Mar 13, 2012·4 cites·2 claims
- 1185US8440052B2Method and arrangement for feeding chemicals into a pulp process streamDUGGIRALA PRASAD·Filed 2009·Granted May 14, 2013·11 cites·1 claims
- 1285US6527914B1Method of enhancing brightness and brightness stability of paper made with mechanical pulpONDEO NALCO CO·Filed 2002·Granted Mar 4, 2003·23 cites·12 claims
- 1384US6942782B2Method and apparatus for measuring deposit forming capacity of fluids using an electrochemically controlled pH change in the fluid proximate to a piezoelectric microbalanceNALCO CO·Filed 2002·Granted Sep 13, 2005·24 cites·18 claims
- 1483US12331461B2Black liquor viscosity reducing and anti-scale agentECOLAB USA INC·Filed 2024·Granted Jun 17, 2025·0 cites·12 claims
- 1581US12504375B2Method for monitoring and control of a wastewater process streamECOLAB USA INC·Filed 2023·Granted Dec 23, 2025·0 cites·19 claims
- 1678US8133350B2Deinking a cellulosic substrate using magnesium silicateDUGGIRALA PRASAD Y·Filed 2008·Granted Mar 13, 2012·2 cites·2 claims
- 1778US7081183B2Method of deresinating pulp using alkyl alcohol alkoxylate surfactantsNALCO CO·Filed 2002·Granted Jul 25, 2006·8 cites·16 claims
- 1878US6146495AKraft process for the production of wood pulp by adding a copolymer of 1,2-dihydroxy-3-butene antiscalantNALCO CHEMICAL CO·Filed 1998·Granted Nov 14, 2000·17 cites·4 claims
- 1975US8884049B2Glycerol based polymer surface active chemistry and productionLI XIAOJIN HARRY·Filed 2012·Granted Nov 11, 2014·2 cites·19 claims
- 2075US7351764B2Methods to enhance brightness of pulp and optimize use of bleaching chemicalsNALCO CO·Filed 2004·Granted Apr 1, 2008·6 cites·10 claims
- 2175US6702921B2Methods to enhance pulp bleaching and delignification using an organic sulfide chelating agentONDEO NALCO CO·Filed 2001·Granted Mar 9, 2004·5 cites·3 claims
- 2273US8617356B2Compositions and processes for paperDUGGIRALA PRASAD·Filed 2012·Granted Dec 31, 2013·1 cites·10 claims
- 2370US2022018772A1Method for Monitoring and Control of a Wastewater Process StreamECOLAB USA INC·Filed 2021·Application pending·0 cites
- 2468US11905655B2Black liquor viscosity reducing and anti-scale agentECOLAB USA INC·Filed 2020·Granted Feb 20, 2024·0 cites·8 claims
- 2567US2024384472A1Drainage aids and the use thereofECOLAB USA INC·Filed 2024·Application pending·0 cites
- 2666US6232419B1Process for the inhibition of scale in harsh systems and novel antiscalants for sameNALCO CHEMICAL CO·Filed 1999·Granted May 15, 2001·9 cites·7 claims
- 2765US6235152B1Process for treating an aqueous liquid containing forming calcium scale salts by adding a copolymer of 1,2-dihdroxy-3-butene antiscalantNALCO CHEMICAL CO·Filed 1999·Granted May 22, 2001·9 cites·3 claims
- 2864US2019204224A1Method for Monitoring and Control of a Wastewater Process StreamECOLAB USA INC·Filed 2019·Application pending·0 cites
- 2962US6440327B1Polymers and use thereof as scale inhibitorsONDEO NALCO CO·Filed 2001·Granted Aug 27, 2002·7 cites·20 claims
- 3061US8317974B2Deinking a cellulosic substrate using magnesium hydroxideDUGGIRALA PRASAD Y·Filed 2012·Granted Nov 27, 2012·0 cites·3 claims
- 3160US8466204B2Deinking a cellulosic substrate using magnesium hydroxideDUGGIRALA PRASAD Y·Filed 2012·Granted Jun 18, 2013·0 cites·11 claims
- 3260US2024247439A1Scale inhibition for pulp digestersECOLAB USA INC·Filed 2024·Application pending·0 cites
- 3358US12503814B2Process to optimize brown stock washing unit operationsECOLAB USA INC·Filed 2022·Granted Dec 23, 2025·0 cites·20 claims
- 3458US7229525B2Methods to enhance pulp bleaching and delignificationNALCO CO·Filed 2005·Granted Jun 12, 2007·0 cites·4 claims
- 3557US2011151151A1Method of producing a print mediumDUGGIRALA PRASAD Y·Filed 2009·Application pending·0 cites
- 3656US7504478B2Additives for increasing the separation yield of tall oil soap from black liquorsNALCO CO·Filed 2007·Granted Mar 17, 2009·1 cites·20 claims
- 3756US2008105392A1Method and composition for improving fiber quality and process efficiency in mechanical pulpingDUGGIRALA PRASAD Y·Filed 2006·Application pending·0 cites
- 3856US2012135906A1Deinking a cellulosic substrate using magnesium silicateDUGGIRALA PRASAD Y·Filed 2012·Application pending·0 cites
- 3955US9416490B2Cross-linked glycerol based polymers as digestion aids for improving wood pulping processesNALCO CO·Filed 2013·Granted Aug 16, 2016·0 cites·19 claims
- 4054US9068293B2Method for improving brightness in bleached pulpNALCO CO·Filed 2013·Granted Jun 30, 2015·0 cites·9 claims
- 4154US2010224333A1Method and chemical composition to improve efficiency of mechanical pulpDUGGIRALA PRASAD·Filed 2009·Application pending·0 cites
- 4254US2004154761A1Methods to enhance pulp bleaching and delignificationFiled 2004·Application pending·0 cites
- 4353US2010006244A1Deinking a cellulosic substrate using an inorganic mineralDUGGIRALA PRASAD Y·Filed 2008·Application pending·0 cites
- 4451US2015034563A1Enhancement of wastewater sludge dewatering using soy flour or soy proteinECOLAB USA INC·Filed 2013·Application pending·0 cites
- 4550US9063080B2Method of deposition monitoringECOLAB USA INC·Filed 2013·Granted Jun 23, 2015·0 cites·19 claims
- 4650US2014318724A1Method and chemical compositions to improve efficiency of chemical pulpingNALCO CO·Filed 2014·Application pending·0 cites
- 4749US2001035271A1Process for the inhibition of scaleFiled 2001·Application pending·0 cites
- 4848US2013078730A1Method for monitoring and control of a wastewater process streamMURCIA MICHAEL J·Filed 2011·Application pending·0 cites
- 4948US2013153506A1Method to improve clarification performance in wastewater treatment applicationsDUGGIRALA PRASAD·Filed 2011·Application pending·0 cites
- 5047US9932709B2Processes and compositions for brightness improvement in paper productionECOLAB USA INC·Filed 2013·Granted Apr 3, 2018·0 cites·9 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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