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![[Search a list of Patent Appplications for class 210]](../as.gif) Class 210 | LIQUID PURIFICATION OR SEPARATION |
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![[List of Patents for class 210 subclass 600]](../ps.gif) | 600 | PROCESSES |
| | 601 |  Treatment by living organism |
| | 602 |  Including plant or animal of higher order |
| | 603 | Including collecting or storing gas (e.g., fuel, carbon monoxide, etc.) |
| | 605 | Anaerobically, with subsequently aerobically treating liquid |
| | 606 | Adding enzyme or releasing same by treating microorganism |
| | 607 | Dividing, treating, and recombining liquid |
| | 608 | Regulating floating constituent |
| | 609 | Including dewatering sludge |
| | 610 | Including adding ancillary growth medium for microorganism |
| | 612 | And regulating temperature during biological step |
| | 614 | Controlling process in response to stream constituent or reactant concentration |
| | 615 | Utilizing contact surfaces supporting microorganism (e.g., trickling filter, etc.) |
| | 620 | Aerobic treatment |
| | 621 |  Recirculating to prior step |
| | 622 |  Of separated liquid |
| | 623 | Of sludge or separated solid |
| | 629 | And internally circulating the liquid |
| | 630 | And anaerobic treatment |
| | 631 | And additional treating agent other than mere mechanical manipulation (e.g., chemical, sorption, etc.) |
| | 632 | Treating by enzyme |
| | 633 | Extracting utilizing solid solute |
| | 635 | Liquid/liquid or gel type (i.e., jellylike) chromatography |
| | 636 | Including cleaning or sterilizing of apparatus |
| | 637 | Including regulating pressure to control constituent gradient at membrane or to prevent rupture of membrane |
| | 638 | Including ion exchange or other chemical reaction |
| | 639 | Including prior use of additive (e.g., changing pH, etc.) |
| | 640 | Passing through membrane in vapor phase |
| | 641 | Utilizing plural diverse membranes |
| | 642 | Extracting water from brine utilizing liquid/liquid solvent or colloidal extraction |
| | 643 | Utilizing liquid membrane (e.g., emulsion) in liquid/liquid solvent or colloidal extraction |
| | 644 | Diffusing or passing through septum selective as to material of a component in liquid/liquid solvent or colloidal extraction |
| | 645 | Biological fluid (e.g., blood, urine, etc.) |
| | 648 | Including regenerating or rehabilitating the extracting liquid in liquid/liquid solvent or colloidal extraction |
| | 649 | Diffusing or passing through septum selective as to material of a component of liquid |
| | 656 | Chromatography |
| | 657 | Utilizing rotating column |
| | 658 | Utilizing paper or thin layer plate |
| | 659 | Including liquid flow diversion |
| | 660 | Ion exchange or selective sorption |
| | 661 | By passing through suspended bed |
| | 662 | And liquid testing or volume measuring |
| | 663 | Including diverse separating or treating of liquid |
| | 664 | By distilling or degassing |
| | 665 | By making an insoluble substance or accreting suspended constituents |
| | 668 | By chemically modifying or inhibiting dispersed constituent |
| | 669 | Prior to ion exchange or sorption |
| | 670 | Including rehabilitating or regenerating exchange material or sorbent |
| | 671 | Of oil sorbent material |
| | 672 | Fractional, selective, or partial type |
| | 673 | Utilizing gas, water, or chemical oxidizing or reducing agent |
| | 674 | Utilizing organic regenerant |
| | 675 | Rehabilitating or regenerating in diverse zone or chamber |
| | 677 | Using conserved or recirculated fluid |
| | 678 | Including liquid flow direction change |
| | 679 | Utilizing exchange or sorbent material associated with inert material |
| | 681 | Removing ions |
| | 682 | Radioactive |
| | 683 | Anions |
| | 687 | Calcium or magnesium (e.g., hardness, water softening, etc.) |
| | 688 | Heavy metal |
| | 689 | Sorbing water from diverse liquid |
| | 690 | Sorbing organic constituent |
| | 695 | Using magnetic force |
| | 696 | Preventing, decreasing, or delaying precipitation, coagulation or flocculation |
| | 702 | Making an insoluble substance or accreting suspended constituents |
