4. Liquid purification or separation
  5. Recirculation
  6. Serially connected distinct treating or storage units

Hubbard H. Donald

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Aerobic treatment plant with filter pipe

Liquid purification or separation – With means to add treating material – With distinct reactor tank – trough or compartment
Reexamination Certificate

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Diffusion bar aerobic treatment plant

Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Reexamination Certificate

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Duo sewage treatment plant

Environmental heating and cooling; fluid handling and sanitary e – Fluid handling or treatment equipment – Treatment
Design Patent

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Sewage treatment system with chlorinator

Liquid purification or separation – Recirculation – Serially connected distinct treating or storage units
Reexamination Certificate

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Three stage sewage treatment plant

Liquid purification or separation – With gas-liquid surface contact means – With separator
Reexamination Certificate

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Profile ID: LFUS-PAI-P-2082580

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