Oxygen scavenging

Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing

Reexamination Certificate

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C252S188280, C525S370000, C422S004000, C428S292100

Reexamination Certificate

active

07014898

ABSTRACT:
A fibrous catalyst comprises at least one transition metal anchored to a polymer fiber having a plurality of grafted units grafted to a polymer backbone. The polymer backbone may be a polyolefin, a fluorinated polyethylene, cellulose or viscose. The grafted units comprise a salt of a carboxylic acid, which in a preferred embodiment is a sodium salt of acrylic acid. The catalysts are particularly suitable for scavenging oxygen from sealed packages or containers and may further comprise a chemical indicator for the presence or absence of oxygen.

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patent: WO 02/36648 (2002-05-01), None
English Abstract of Japanese Patent No. 55043428 (published Mar. 27, 1980).
International Search Report dated Feb. 27, 2002, from International Application No. PCT/GB01/03483.
British Search Report dated Dec. 22, 2000, from UK Application No. 0018935.7.

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