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Class Information
Number: 75/417
Name: Specialized metallurgical processes, compositions for use therein, consolidated metal powder compositions, and loose metal particulate mixtures > Processes > Producing or treating free metal > At 300 degrees c or greater (e.g., pyrometallurgy, etc.) > Combined with step at less than 300 degrees c using nonmetallic material which is liquid under standard conditions (e.g., hydrometallurgy, etc.) > Obtaining metal from photographic waste
Description: Process wherein the source of metal is photographic waste.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 6274045 |
Method for recovering and separating metals from waste streams |
Aug. 14, 2001 |
| 5908559 |
Method for recovering and separating metals from waste streams |
Jun. 1, 1999 |
| 5755853 |
Process for the treatment of solid residues containing metals, in particular residues from the cleaning of household garbage incineration smoke |
May. 26, 1998 |
| 5695645 |
Methods for removing silver from spent photoprocessing solution |
Dec. 9, 1997 |
| 5605632 |
Silver recovery device and process |
Feb. 25, 1997 |
| 5580905 |
Process for recycling polyesters |
Dec. 3, 1996 |
| 5395858 |
Process for recycling polyester |
Mar. 7, 1995 |
| 5064466 |
Non-toxic process for recovery of photographic silver |
Nov. 12, 1991 |
| 5008017 |
Method for recovering metals from waste liquors |
Apr. 16, 1991 |
| 4834849 |
Metal recovery method and apparatus |
May. 30, 1989 |
| 4755453 |
Method for recovering silver from waste solutions containing thiosulfate compounds |
Jul. 5, 1988 |
| 4437889 |
Method of recovering silver from solid and liquid photographic waste |
Mar. 20, 1984 |
| 4331472 |
Metal removal apparatus and method |
May. 25, 1982 |
| 4289530 |
Symmetrical quaternary ammonium compounds and their use in heavy metals recovery |
Sep. 15, 1981 |
| 4150977 |
Process for stripping photographic materials |
Apr. 24, 1979 |
| 3982932 |
Recovery of silver from gelatinous photographic wastes |
Sep. 28, 1976 |
| 3960550 |
Silver recovery process |
Jun. 1, 1976 |
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