WATER RESEARCH COMMISSION

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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 550
 
  
 
B01D SEPARATION 2132
 
  
 
C01G COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F 138
 
  
 
D01D MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES, OR RIBBONS126

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
6228263 Treatment of sulphate- and metal-containing waterOct 14, 99May 08, 01[C01G, C02F]
6203700 Process for treating metal-containing acid waterJul 30, 99Mar 20, 01[C02F]
6197196 Treatment of waterJul 30, 99Mar 06, 01[C02F]
6110370 Treatment of waterAug 25, 98Aug 29, 00[C02F]
5945002 Method of producing secondary metabolitesAug 30, 96Aug 31, 99[B01D]
5925258 Upright tubular filter unit and method of separation using the filter unitJul 05, 96Jul 20, 99[B01D]
5833896 Method of making a hollow fibre membraneJun 06, 96Nov 10, 98[D01D]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
7285216 Treatment of waterExpiredMay 16, 03Oct 23, 07[C02F]
6521128 Treatment of water containing carbonaceous solidsExpiredJun 13, 01Feb 18, 03[C02F]
6315904 Process for treating sulphate-containing waste waterExpiredJul 30, 99Nov 13, 01[C02F]
5595662 Water purification deviceExpiredAug 21, 95Jan 21, 97[B01D]
5357865 Method of cloud seedingExpiredFeb 21, 92Oct 25, 94[A01G, F42B]
4985145 Semipermeable membranesExpiredJan 30, 89Jan 15, 91[B01D]
4770793 Dewatering slurriesExpiredJan 28, 87Sep 13, 88[B01D]
4752363 Effluent treatmentExpiredJun 19, 87Jun 21, 88[C25B]

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