Authorized filter servicing and replacement

Gas separation: processes – Filtering

Reexamination Certificate

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Details

C055S385300, C055S419000, C055S484000, C055S502000, C055S529000, C123S19800E

Reexamination Certificate

active

07959714

ABSTRACT:
A method is provided for servicing a filter, and structure is provided disabling assembly of the filter unless an authorized replacement filter element is used.

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