Barrier Separation (e.g., Using Membrane, Filter Paper, Etc.) Patents (Class 204/518)
- Combined with manufacture or pretreatment of barrier (Class 204/521)
- Using both anion and cation selective membranes (Class 204/522)
- Alternating anion and cation selective membranes (Class 204/523)
- And using ion exchange material (e.g., suspended particles, etc.) (Class 204/524)
- With prevention of scale buildup or fouling of membrane (Class 204/525)
- Gas or vapor treated (Class 204/526)
- Biological material prepared, recovered, or treated (e.g., urine, etc.) (Class 204/527)
- Regeneration of liquid electrolyte (Class 204/528)
- Metal or metal salt recovered or removed (Class 204/529)
- Organic material prepared, recovered, or treated (Class 204/530)
- Acid prepared, recovered, or treated (Class 204/531)
- And using nonion selective membrane (Class 204/532)
- And using ion exchange material (e.g., suspended particles, etc.) (Class 204/533)
- And using bipolar membrane (Class 204/534)
- And using nonion selective membrane (Class 204/535)
- And using ion exchange material (e.g., suspended particles, etc.) (Class 204/536)
- Using bipolar membrane (Class 204/537)
- Using anion selective membrane (Class 204/539)
- Biological material prepared, recovered, or treated (e.g., urine, etc.) (Class 204/540)
- Organic material prepared, recovered, or treated (Class 204/541)