Air filter

Details Air filter Air filter

2007-10-23

2007-10-23

Savage, Matthew (Department: 1724)

Gas separation: apparatus

With sterilizing means

C424S450000, C424S488000, C424S400000, C424S076210, C424S078360, C424S078370, C514S058000, C514S937000, C536S101000, C536S103000, C502S404000

Reexamination Certificate

active

10049436

ABSTRACT:
An air-filter for a circulating and/or recirculating air system using a filter medium containing a microbiologically effective amount of a polymeric biguanide or salt thereof. Also claimed is a method for reducing odors and/or air-borne micro-organisms in a circulating or recirculating air system using the air-filter, and a method for protecting an air-filter medium against microbial degradation by incorporating in, or on, the medium a microbiologically effective amount of a polymeric biguanide or salt thereof.

REFERENCES:
patent: 3892846 (1975-07-01), Wortham
patent: 5288298 (1994-02-01), Aston
patent: 5370721 (1994-12-01), Carnahan
patent: 5840245 (1998-11-01), Coombs et al.
patent: 5874052 (1999-02-01), Holland
patent: 5876489 (1999-03-01), Kunisaki et al.
patent: 6436442 (2002-08-01), Woo et al.
patent: 6548054 (2003-04-01), Worley et al.
patent: 2001/0056080 (2001-12-01), Woo et al.
patent: 2002/0007055 (2002-01-01), Uchiyama et al.
patent: 2002/0010106 (2002-01-01), Uchiyama et al.
patent: 2002/0010154 (2002-01-01), Uchiyama et al.
patent: 2003/0143187 (2003-07-01), Worley et al.
patent: 1125631 (1998-05-01), None
patent: 11253716 (1999-09-01), None
A translation copy in English of the above foreign patents.

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