| Patent Number |
Title Of Patent |
Date Issued |
| 6878258 |
Apparatus and method for removing contaminants from semiconductor copper electroplating baths |
Apr. 12, 2005 |
| 6827832 |
Electrochemical cell and process for reducing the amount of organic contaminants in metal plating baths |
Dec. 7, 2004 |
| 6733679 |
Method of treating an electroless plating waste |
May. 11, 2004 |
| 6607651 |
Process and system for treating the discharge stream from an ion exchanger |
Aug. 19, 2003 |
| 6596148 |
Regeneration of plating baths and system therefore |
Jul. 22, 2003 |
| 6398964 |
Process for treating aqueous waste containing copper and copper CMP particles |
Jun. 4, 2002 |
| 6391209 |
Regeneration of plating baths |
May. 21, 2002 |
| 6254782 |
Method for recovering and separating metals from waste streams |
Jul. 3, 2001 |
| 6207033 |
Process and apparatus for regeneration of chromium plating bath |
Mar. 27, 2001 |
| 6162361 |
Plating waste water treatment and metals recovery system |
Dec. 19, 2000 |
| 6120673 |
Method and device for regenerating tin-plating solutions |
Sep. 19, 2000 |
| 6103088 |
Process for preparing bismuth compounds |
Aug. 15, 2000 |
| 6063252 |
Method and apparatus for enriching the chromium in a chromium plating bath |
May. 16, 2000 |
| 6056862 |
Process and apparatus for supplying metal ions to alloy electroplating bath |
May. 2, 2000 |
| 5948264 |
Ion exchange and regeneration process for separation and removal of iron (III) ions from aqueous sulfuric acid metal ion-containing solutions |
Sep. 7, 1999 |
| 5932109 |
Plating rinse water treatment |
Aug. 3, 1999 |
| 5891343 |
Method for removing ferrous ions from acidic tinning electrolytes and tinning electrolyte recovery plant for iron using the same |
Apr. 6, 1999 |
| 5840170 |
Method for inhibiting the electrodeposition of organic particulate matter on copper foil |
Nov. 24, 1998 |
| 5766440 |
Method for treating sludge precipitated in a plating bath containing haloid ions |
Jun. 16, 1998 |
| 5766428 |
Chromium plating solution, solution waste from chromium plating and closed recycling system for chromic acid cleaning water in chromium plating |
Jun. 16, 1998 |
| RE35730 |
Apparatus and process to regenerate a trivalent chromium bath |
Feb. 17, 1998 |
| 5690804 |
Method and plant for regenerating sulfate electrolyte in steel strip galvanizing processes |
Nov. 25, 1997 |
| 5650056 |
Method of and apparatus for removing metal contained in solution and surfactant having chelating ability and used suitably for the same |
Jul. 22, 1997 |
| 5599458 |
Method to prevent the exhaustion of acid copper plating baths and to recover metallic copper from solutions and sludges containing copper in an ionic form |
Feb. 4, 1997 |
| 5582737 |
Ion exchange and regeneration process for separation and removal of iron (III) ions from aqueous sulfuric acid metal ion-containing solutions |
Dec. 10, 1996 |
| 5523001 |
Treatment of electroless plating waste streams |
Jun. 4, 1996 |
| 5500126 |
Process for removal of metal ions from aqueous solutions |
Mar. 19, 1996 |
| 5482694 |
Regeneration of cyanide by oxidation of thiocyanate |
Jan. 9, 1996 |
| 5472585 |
Regeneration of spent electroless copper plating solution |
Dec. 5, 1995 |
| 5462670 |
Process for removing oils and greases from aqueous solution |
Oct. 31, 1995 |
| 5451323 |
Method for recovering and reproducing tinning liquid |
Sep. 19, 1995 |
| 5427692 |
Removal of chromium from solution using ferrous sulfate and barium nitrate |
Jun. 27, 1995 |
| 5421966 |
Electrolytic regeneration of acid cupric chloride etchant |
Jun. 6, 1995 |
| 5419821 |
Process and equipment for reforming and maintaining electroless metal baths |
May. 30, 1995 |
| 5415848 |
Method for removal of hexavalent chromium from a solution |
May. 16, 1995 |
| 5405507 |
Electrolytic treatment of an electrolytic solution |
Apr. 11, 1995 |
| 5366715 |
Method for selectively removing antimony and bismuth from sulphuric acid solutions |
Nov. 22, 1994 |
| 5312539 |
Electrolytic tin plating method |
May. 17, 1994 |
| 5298168 |
Ferrous dithionite process and composition for removing dissolved heavy metals from water |
Mar. 29, 1994 |
| 5290455 |
Removal of cyanide from aqueous streams |
Mar. 1, 1994 |
| 5277775 |
System for treatment of photographic wastewater effluent |
Jan. 11, 1994 |
| 5269905 |
Apparatus and process to regenerate a trivalent chromium bath |
Dec. 14, 1993 |
| 5266212 |
Purification of cyanide-free copper plating baths |
Nov. 30, 1993 |
| 5246559 |
Electrolytic cell apparatus |
Sep. 21, 1993 |
| 5230782 |
Electrolytic process for reducing the organic content of an aqueous composition and apparatus therefore |
Jul. 27, 1993 |
| 5227046 |
Low temperature tin-bismuth electroplating system |
Jul. 13, 1993 |
| 5223119 |
Gas treatment method for removal of liquid droplets |
Jun. 29, 1993 |
| 5211853 |
Method for the removal of chromium compounds from aqueous solutions |
May. 18, 1993 |
| 5211819 |
Micro-effluent process for rinsing water in industrial processing |
May. 18, 1993 |
| 5207890 |
Use of barium chromate as a sulfate scavenger in chromium electroplating baths |
May. 4, 1993 |
