4. Liquid purification or separation
  5. Processes
  6. Treatment by living organism

David E. Severeid

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Apparatus for making carboxylated pulp fibers

Paper making and fiber liberation – Processes of chemical liberation – recovery or purification... – With chemical or physical modification of liberated fiber
Reexamination Certificate

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Process for the secondary treatment of wastewater

Liquid purification or separation – Processes – Treatment by living organism
Patent

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Profile ID: LFUS-PAI-P-1680720

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