PETROLITE CORPORATION

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
B01D SEPARATION 1133
 
  
 
B03D FLOTATION; DIFFERENTIAL SEDIMENTATION 114
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
C09K MATERIALS FOR APPLICATIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR194
 
  
 
C10L FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G OR C10K; LIQUEFIED PETROLEUM GAS; USE OF ADDITIVES TO FUELS OR FIRES; FIRE-LIGHTERS 141
 
  
 
C23F NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACES 135

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5858927 Aqueous external crystal modifier dispersionAug 29, 96Jan 12, 99[C09K]
5785895 Biodegradable corrosion inhibitors of low toxicityDec 06, 95Jul 28, 98[C23F]
5672183 Anti-static additives for hydrocarbonsJul 01, 96Sep 30, 97[C10L]
5540337 Alkyloxyalkaneamines useful as cationic froth flotation collectorsApr 04, 94Jul 30, 96[B03D]
5480860 Methods for reducing sulfides in sewage gasJan 12, 95Jan 02, 96[B01D]
5008144 Overprint aqueous varnishNov 28, 89Apr 16, 91[B32B]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6019912 Polyvalent metal cations in combination with dithiocarbamic acid compositions as broad spectrum demulsifiersExpiredNov 03, 94Feb 01, 00[C10G, B01D]
5545351 Use of stearic acid esters of polypropylene glycol to control foamExpiredSep 19, 95Aug 13, 96[B03D, B01D]
5263539 Scale inhibition during oil productionExpiredDec 05, 91Nov 23, 93[E21B]
RE34329 Overprint aqueous varnishExpiredMar 10, 92Aug 03, 93[C08L]
5223127 Hydrogen sulfide scavengers in fuels, hydrocarbons and water using amidines and polyamidinesExpiredJul 18, 91Jun 29, 93[C10G]
5197627 Double walled storage tankExpiredMar 08, 91Mar 30, 93[B65D]
5151195 Flotation-aid composition and method of use thereofExpiredAug 11, 88Sep 29, 92[B01D]
5112505 Certain dithiocarbamates and method of use for reducing asphaltene precipitation in asphaltenic reservoirsExpiredSep 13, 90May 12, 92[C09K]
5102580 Demulsifier compositions and demulsifying use thereofExpiredMay 28, 91Apr 07, 92[B01D]
5089611 Alkyl-2-thiosubstituted-3-substituted-2-butenoates and their synthesisExpiredMar 12, 90Feb 18, 92[C07D, C07C]
5047069 Antioxidants for liquid hydrocarbonsExpiredOct 22, 90Sep 10, 91[C10L]
5026918 Synthesis of 2,3,5-trisubstituted-2-cyclopentenones via base induced cyclization of alpha-chloro unsaturated ketonesExpiredApr 27, 90Jun 25, 91[C07C]
5023382 Synthesis of 2,3-disubstituted-2-cyclopentenones via lithiomethylmercapto compoundsExpiredJan 24, 90Jun 11, 91[C07C]
5021587 Synthesis of N,3,4-trisubstituted-3-azoline-2-onesExpiredJan 24, 90Jun 04, 91[C07D]
4918959 Method for preventing the buildup of oily deposits on rolling mill scaleExpiredFeb 06, 89Apr 24, 90[B21B]
4920141 Synergistic biocides of certain nitroimidazoles and aldehydesExpiredFeb 24, 88Apr 24, 90[A01N]
4908063 Additive composition for water-based inksExpiredNov 04, 88Mar 13, 90[C09D]
4900427 Antifoulant compositions and methodsExpiredJul 21, 89Feb 13, 90[C10G]
4898751 Composition and method for prevention of adhesion of particulate matter to containersExpiredApr 14, 86Feb 06, 90[B05D, C08L]
4877578 Corrosion inhibitorsExpiredMar 29, 85Oct 31, 89[C23F]

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