US PATENT SUBCLASS 204 / 525
.~.~.~.~.~.~ With prevention of scale buildup or fouling of membrane

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


204 /   HD   CHEMISTRY: ELECTRICAL AND WAVE ENERGY

*  DD  PROCESSES AND PRODUCTS {7}
450  DF  .~ Electrophoresis or electro-osmosis processes and electrolyte compositions therefor when not provided for elsewhere {14}
518  DF  .~.~ Barrier separation (e.g., using membrane, filter paper, etc.) {5}
520  DF  .~.~.~ Ion selective {8}
522  DF  .~.~.~.~ Using both anion and cation selective membranes {4}
523  DF  .~.~.~.~.~ Alternating anion and cation selective membranes {8}
525.~.~.~.~.~.~ With prevention of scale buildup or fouling of membrane

DEFINITION

Classification: 204/525

With prevention of scale buildup or fouling of membrane:

(under subclass 523) Process in which action is taken to prevent accumulation of scale or fouling substances on a membrane or other internal components of a chamber used during separation.

(1) Note. This subclass is not intended to provide for mere recycling of process fluid unless specifically recited to prevent scale buildup or fouling of a membrane.