In the case of a filter for vacuum cleaners, all of the filter parts (1, 2, 4) are produced from biodegradable materials and at least one filter part (4) is produced from a biodegradable polymeric material, for the purpose of biological disposal. <IMAGE>
申请公布号
DE4322222(A1)
申请公布日期
1995.01.12
申请号
DE19934322222
申请日期
1993.07.03
申请人
LICENTIA PATENT-VERWALTUNGS-GMBH, 60596 FRANKFURT, DE
