Hazen Research, Inc.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
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 240
 
  
 
B02C CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN 134
 
  
 
C01G COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 138

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
7208023 Dry dust control materialsFeb 14, 03Apr 24, 07[C10L]
6422494 Methods of controlling the density and thermal properties of bulk materialsJun 30, 00Jul 23, 02[B02C]
6231627 Method to reduce oxidative deterioration of bulk materialsDec 22, 98May 15, 01[C10L]
5762891 Process for stabilization of arsenicFeb 27, 96Jun 09, 98[C01G]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
6786941 Methods of controlling the density and thermal properties of bulk materialsExpiredJul 16, 02Sep 07, 04[C01L, B07B]
5919277 Method to reduce oxidative deterioration of bulk materialsExpiredDec 22, 97Jul 06, 99[C10L]
5904783 Method for reducing lead leaching in fixturesExpiredSep 24, 97May 18, 99[C22B]
5725613 Method to reduce oxidative deterioration of bulk materialsExpiredJul 08, 96Mar 10, 98[C10L]
5660735 Method for removing metals from waste solutionsExpiredJul 15, 96Aug 26, 97[C02F]
5536416 Method for removing metals from a solutionExpiredOct 31, 94Jul 16, 96[C02F]
5399322 Selective recovery of dissolved metals and preparation of metal salt productsExpiredOct 15, 92Mar 21, 95[B01D]
5320759 Selective recovery of heavy metals using xanthatesExpiredJun 11, 92Jun 14, 94[C02F]
4556422 Process for the recovery of lead and silver chloridesExpiredApr 20, 81Dec 03, 85[C22B, C01G]
4459103 Automatic volatile matter content analyzerExpiredMar 10, 82Jul 10, 84[F27B, C21D]
4276084 Hydrometallurgical process for the recovery of leadExpiredOct 01, 79Jun 30, 81[C22B]
4257781 Process for enhancing the fuel value of low BTU gasExpiredJan 12, 79Mar 24, 81[C10K]
4182308 Solar energy collectorExpiredNov 07, 77Jan 08, 80[F24J]

Top Inventors for This Owner

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