METHOD FOR MANUFACTURE OF ELECTRET FILTER Russian patent published in 1996 - IPC

Abstract RU 2056950 C1

FIELD: wood-pulp and paper industry. SUBSTANCE: nonuniform distribution of charges are induced by irradiation of polarized surface of electret by radiation through shadow-transmitting mask. EFFECT: higher efficiency. 2 dwg

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RU 2 056 950 C1

Authors

Novikov G.K.

Novikova L.N.

Dates

1996-03-27Published

1992-10-27Filed