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| Number | Title | Issue Date |
| 7354733 | Method for sorting and separating living cells We disclose methods of sorting or separating mixtures of living cells (e.g., eukaryotic, prokaryotic, mammalian, pathogenic, bacterial, viral, etc.). We perform our methods by activating cell-selective photophoric labels, which photosensitize and chemically reduce a... | 04/08/2008 |
| 7314500 | Systems and methods for removing contaminate material from a flowable material A method of removing contaminate material from a flowable material, comprising the following steps. A first container defining a first chamber is provided. A second container defining a second chamber is arranged within the first chamber. A first removal material is... | 01/01/2008 |
| 7066983 | Method for thiosulfate leaching of precious metal-containing materials Processes are provided for recovering precious metals from refractory materials using thiosulfate lixiviants. The processes can employ lixiviants that include at most only small amounts of copper and/or ammonia and operate at a relatively low pH, reduction of polyth... | 06/27/2006 |
| 6780221 | Waste metal removal systems and methods A removal system for removing a waste metal from a waste solution. The removal system comprises outer and inner containers, inlet, intermediate, and outlet conduits, and first and second reaction media. The inner container defines an upper wall portion and is locate... | 08/24/2004 |
| 6572677 | Gelatin encapsulated metal powder for silver recovery from processing solutions The present invention relates to the use of fine metal particles for the recovery of silver from a silver-bearing photographic waste solution. In particular, the metal particles are encapsulated in a hydrophilic colloid that allows for the permeability of... | 06/03/2003 |
| 6558449 | Waste metal removal systems and methods A removal system for removing a waste metal from a waste solution. The removal system comprises outer and inner containers and inlet, intermediate, and outlet conduits. The outer container defines an outer chamber, and the inner container defines an inner... | 05/06/2003 |
| 6290749 | Preparation of ultra-pure silver metal A method for preparing ultra-pure silver from a crude silver mixture containing metallic and/or non-metallic impurities, said method comprising; dissolving the crude silver mixture in nitric acid to form a crude silver nitrate solution; adding a first sel... | 09/18/2001 |
| 6290747 | Conversion of impure silver halide to ultra-pure silver metal A method for preparing ultra-pure silver from a crude silver halide matrix containing metallic and/or non-metallic impurities, said method comprising; roasting the crude silver halide matrix to substantially remove carbonaceous material; treating the roas... | 09/18/2001 |
| 6179898 | Aluminosilicate organic-inorganic polymer An organic-inorganic polymer comprising aluminosilicate having grafted thereon an organic radical having a --SH or --S(--CH2)n --S-- group wherein n is from 0 to 4.... | 01/30/2001 |
| 5993668 | Method for removing metal ions and/or complexes containing metal ions from a solution Metal ions and/or complexes of metal ions are removed from a solution by formation of an insoluble chelated complex of the metal ions and a polymeric precipitating agent. A two-step process of mixing the influent with the precipitating agent is used to in... | 11/30/1999 |
| 5961939 | Process for recovery of silver from hardening photoprocessing solutions There is provided a method for removing silver from photoprocessing solutions containing hardening agents which comprises: a) adding a chelating agent to the photoprocessing solution in an amount sufficient to inhibit the precipitation of the high valent catio... | 10/05/1999 |
| 5900041 | Value metal recovery Value metal, for example, silver in a spent silver bearing photographic solution is efficiently recovered in an exchange mass comprising a particulate inert substrate, for example, cellulosic fibers, synthetic fibers or sponge particles, co-mingled and in... | 05/04/1999 |
| 5759410 | Process for recovering mercapto-s-triazines from silver precipitate There is provided a process for converting a silver-mercapto-s-triazine precipitate to a solid containing silver and a solution containing mercapto-s-triazine by contacting the silver-mercapto-s-triazine precipitate with one or more reducing agents. In pr... | 06/02/1998 |
| 5695645 | Methods for removing silver from spent photoprocessing solution Spent solutions from photographic processors are fed into a conduit (18) to which subsequently are added precipitating agents from a first source (22) and flocculating agents from a second source (28); so that, well grown or ripened clumps of flocculated ... | 12/09/1997 |
| 5605632 | Silver recovery device and process A silver recovery device (30) is described for removing silver from a silver-containing solution. The device (30) comprises an ion-exchange resin bed (34) and a pump (62) for directing the solution through the resin bed (34). The pump (62) is positioned d... | 02/25/1997 |
| 5580905 | Process for recycling polyesters A process for recycling polyester contained in waste materials is provided. The polyester is converted into a corresponding acid salt of a polybasic organic acid and a polyol. The process steps generally include first combining materials containing polyes... | 12/03/1996 |
| 5474593 | Agent for treating metal ions in an aqueous solution, process for producing the metal ion-treating agent and method for treating metal ions in an aqueous solution An agent for treating metal ions in an aqueous solution, comprising a solid porous carrier and, supported thereon, an organic reagent (hereinafter referred to as a "redox reagent") which is capable of converting metal ions (inclusive of metal complex ions... | 12/12/1995 |
| 5464727 | Cleaning of emulsion manufacturing apparatus The present invention is a method for cleaning and preparing photographic manufacturing equipment surfaces. An aqueous solution of potassium iodide and ferric ethylenediamine tetraacetate is prepared. The solution is flushed over the surfaces of the photo... | 11/07/1995 |
| 5458024 | Apparatus and method for recovery of silver An improved apparatus and method for recovering metallic silver from solutions containing silver ions by reducing silver ions and oxidizing an element in the electromotive series above silver, such as iron. The apparatus provides plug flow of solution int... | 10/17/1995 |
| 5372631 | Reduction of silver halides in photoemulsion using sodium borohydride and reducing sugars Photoemulsion is reduced with a combination of reducing sugar and sodium borohydride, resulting in increased silver recovery.... | 12/13/1994 |
| 5310629 | Silver recovery element and method A silver recovery element (10) for treating a photographic developer solution containing silver ions comprises a substrate (20) having thereon a hydrophilic colloid layer containing physical development nuclei. The invention also comprises a process for r... | 05/10/1994 |
| 5298170 | Effluent neutralization process and chamber An effluent precipitation and neutralization chamber for mixing and neutralizing spent photographic developer and fixer. The fixer inlet discharging into a vertically oriented conduit located within the vessel, which contains iron therein and defines a gr... | 03/29/1994 |
| 5286463 | Composition for recovering metals and process for using same A novel composition for use in reducing and recovering metals, such as silver, and for use in stripping adhesive polymer layers from various polymer bases, such as polyester, and processes for using same are provided. The composition and variations thereo... | 02/15/1994 |
| 5229009 | Effluent precipitation and neutralization chamber An effluent precipitation and neutralization chamber for mixing and neutralizing spent photographic developer and fixer. A baffle and long folded ribbons inside the chamber promote mixing of the developer and fixer. A source of iron ions such as fine stee... | 07/20/1993 |
| 5210009 | Silver recovery element and process An element and a process for recovering silver from a photographic developer solution containing silver ions. The silver recovery element (10) comprises a support (12) having a hydrophilic colloid layer (16) containing physical development nuclei on at le... | 05/11/1993 |
| 5188662 | Silver recovery process A process for treating a photographic developer solution containing silver ion comprises contacting the solution with a silver recovery element (10), which comprises a substrate (12) having thereon a hydrophilic colloid layer (16) containing physical deve... | 02/23/1993 |
| 5137700 | Processes employing iodine-iodide etching solutions Aqueous iodine-iodide etching solutions are employed in the recovery of precious metals. Elemental iodine is precipitated from spent etching solutions and used to supply both the iodine and iodide of new etching solutions. Prior to extraction of the eleme... | 08/11/1992 |
| 5132022 | Effluent precipitation and neutralization chamber An effluent precipitation and neutralization chamber for mixing and neutralizing spent photographic developer and fixer. A baffle and long folded ribbons inside the chamber promote mixing of the developer and fixer. A source of iron ions such as fine stee... | 07/21/1992 |
| 5128002 | Method for processing residual baths from the photographic and photochemical industries A method for processing residual liquids comprising organic complexes of heavy metals, sulphur and nitrogen compounds and amongst others originating from fixing baths and the like of the photographic and photochemical industries, whereby the residual liqu... | 07/07/1992 |
| 5112390 | Replaceable core silver recovery equipment and method of making and using Equipment and methods for an efficient, low cost silver recovery apparatus for recovering silver from a silver-containing solution. The apparatus comprises a replaceable silver recovery subassembly, stackable container, lid, lock ring which is locked or s... | 05/12/1992 |
| 5085836 | Process for desilvering silver halide processing fluids A method to reduce dissolved silver present in spent, waste, photographic processing fluids containing thiosulfate, is described. This process involves adjusting the pH to a low level prior to the addition of finely ground steel to the solution. With the ... | 02/04/1992 |
| 5078978 | Pyridine-containing alkoxysilanes bonded to inorganic supports and processes of using the same for removing and concentrating desired ions from solutions A method is disclosed for the quantitative removal and concentration of desired transition metal ions from a source solution which may contain larger concentrations of other metal and H+ ions. The method comprises bringing the source solution ... | 01/07/1992 |
| 5071476 | Recovery silver from photo sensitive materials A system for recovering silver from photographic film comprises a wash mixer adapted to hold the film and wash water comprising water, a proteolytic enzyme and a floculant. The mixer is adapted to rotate about its longitudinal axis and comprises spiral fi... | 12/10/1991 |
| 5064466 | Non-toxic process for recovery of photographic silver A non-toxic process for the recovery of silver from silver containing photographic emulsion coated paper or film substrates is provided. The process includes the use of a stripping formulation comprised of an alkaline bleach solution which is capable of h... | 11/12/1991 |
| 5026029 | Silver controller A silver controller comprising a container, a core member fitted within the container, a filler material around the core member, and a fluid deflector extending around the filler material. The container has an inlet and an outlet and a base. The inlet is ... | 06/25/1991 |
| 5004212 | Apparatus with improved flow-through characteristics for the recovery of silver from silver-containing waste fluids An improved canister for the recovery of silver from acidic, waste fluids is described. This canister comprises both inner and outer element, each removable from the other, with fitted top and bottom sections. The novel canister thus described, provides a... | 04/02/1991 |
| 4997166 | Silver recovery system A sealed, pressurized system for processing silver bearing solutions, such as photographic solutions, for the purpose of removing the silver comprises a series of interconnected sealed containers each of which contains several spaced apart reels or masses... | 03/05/1991 |
| 4868120 | Method of recovering both silver and a base for sensitive materials from sensitive materials by utilizing micro-organisms Method of recovering both silver and a base in a reusable condition from sensitive material, such as a film or a photographic printing paper, having surfaces including gelatine and fine silver crystal, by utilizing micro-organisms of a mixture of bacteria... | 09/19/1989 |
| 4854552 | Apparatus for recovery of silver from spent, waste, acidic processing fluids Apparatus for recovery of silver from spent, waste acidic silver halide photographic processing fluid, e.g., fixer solution, comprising passing the fluid through finely divided iron e.g., steel wool, contained in a vessel in the presence of a metal salt o... | 08/08/1989 |
| 4842644 | Silver recovery method Methods of and apparatus for recovering silver and other metals from solutions containing compounds of those metals. The solution being treated is pumped upwardly under pressure and at a constant rate through a reaction mass or medium to promote ion excha... | 06/27/1989 |
