Device and method for manufacturing a particulate filter...

Radiant energy – Irradiation of objects or material

Reexamination Certificate

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C250S491100, C250S492300, C430S004000, C430S005000, C430S269000, C430S270100, C216S056000

Reexamination Certificate

active

07960708

ABSTRACT:
Various embodiments disclose devices and methods for fabricating microporous particulate filters with regularly space pores wherein sheet membrane substrates are exposed to energetic particle radiation through a mask and the damaged regions removed in a suitable developer. The required depth of field is achieved by using energetic particles to minimize diffraction and an energetic particle source with suitably small diameter.

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