NALCO CHEMICAL COMPANY

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
C02F TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE 649
 
  
 
G01N INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES 5201
 
  
 
B01D SEPARATION 4130
 
  
 
C23F NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES 234
 
  
 
A61C DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE 156
 
  
 
A61L METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION, OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS, OR SURGICAL ARTICLES 170
 
  
 
B03D FLOTATION; DIFFERENTIAL SEDIMENTATION 114
 
  
 
B05B SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES 163
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
C01B NON-METALLIC ELEMENTS; COMPOUNDS THEREOF178

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6753388 Structurally-modified polymer flocculantsJul 17, 03Jun 22, 04[C08J, C08F]
6394798 Unitary metal injection molded orthodontic bracketAug 31, 00May 28, 02[A61C]
6358746 Fluorescent compounds for use in industrial water systemsNov 08, 99Mar 19, 02[G01N]
6331229 Method of increasing retention and drainage in papermaking using high molecular weight water-soluble anionic or monionic dispersion polymersSep 08, 99Dec 18, 01[D21H]
6329165 Measurement and control of sessile and planktonic microbiological activity in industrial water systemsDec 30, 99Dec 11, 01[C12Q]
6306308 Inorganic composition, process of preparation and method of useApr 20, 99Oct 23, 01[C09K, C01F, C02F, B01D]
6280635 Autocycle control of cooling water systemsMay 01, 00Aug 28, 01[B03D, C02F]
6270722 Stabilized bromine solutions, method of manufacture and uses thereof for biofouling controlMar 31, 99Aug 07, 01[C01B, D06L, A61L]
6214627 Rapid colorimetric method for measuring polymers in aqueous systemsMar 26, 99Apr 10, 01[G01N]
6136205 Process to manufacture stabilized alkali or alkaline earth metal hypobromite and uses thereof in water treatment to control microbial foulingMay 05, 99Oct 24, 00[C02F]

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6599489 Aluminum trihydrate crystals and improved method for the production thereofExpiredApr 02, 01Jul 29, 03[C01F]
2002/0065,358 METHOD OF INHIBITING SCALE FORMATION USING WATER-SOLUBLE POLYMERS HAVING PENDANT DERIVATIZED AMIDE FUNCTIONALITIESAbandonedJun 15, 99May 30, 02[C08K]
6380431 Fluorescent monomersExpiredAug 31, 99Apr 30, 02[C07C]
6352675 Process for removing heavy metals from a caustic fluid streamExpiredJun 07, 99Mar 05, 02[C22B]
6344531 Fluorescent water-soluble polymersExpiredAug 31, 99Feb 05, 02[C08F]
6315866 Method of increasing the dry strength of paper products using cationic dispersion polymersExpiredFeb 29, 00Nov 13, 01[D21H]
2001/0018,503 Fluorescent water-soluble polymersAbandonedMar 30, 01Aug 30, 01[C08F]
6267897 Method of inhibiting biofilm formation in commercial and industrial water systemsExpiredMay 04, 00Jul 31, 01[C02F]
6225430 Sulfobetaine-containing polymers and their utility as calcium carbonate scale inhibitorsExpiredMay 14, 98May 01, 01[C08F]
6210585 Fatty acid free latex polymer flocculantsExpiredMar 30, 00Apr 03, 01[C08F, C02F, C08L]
6168029 Method for separating electrically conductive mineral components from electrically non-conductive mineral components of an oreExpiredMay 12, 99Jan 02, 01[B03B]
6153106 Method for inhibiting the formation and deposition of silica scale in water systemsExpiredMar 03, 99Nov 28, 00[C02F]
6124396 Branched water-soluble acrylamide copolymers of high molecular weight and process for manufacturing themExpiredMar 23, 98Sep 26, 00[C08J, C08F, C08L]
6098673 Outlet fitting and container having the same and method for containing a material and draining and filling the sameExpiredOct 07, 98Aug 08, 00[B65B]
6075082 Cross-linked polymide binders for ceramics manufactureExpiredSep 29, 98Jun 13, 00[C08G, C08F, C08K]
6060318 Tracing of process additives in industrial ceramics applicationsExpiredDec 31, 98May 09, 00[G01N]
6048438 Method to enhance the performance of polymers and copolymers of acrylamide as flocculants and retention aidsExpiredNov 26, 97Apr 11, 00[D21H]
6042732 Starch/cationic polymer combinations as coagulants for the mining industryExpiredApr 15, 99Mar 28, 00[C02F]
6033524 Selective retention of filling components and improved control of sheet properties by enhancing additive pretreatmentExpiredNov 24, 97Mar 07, 00[D21H]
6022401 Biodegradable modified polyaspartic polymers for corrosion and scale controlExpiredApr 17, 98Feb 08, 00[C23F]

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