Stock material or miscellaneous articles – Hollow or container type article – Polymer or resin containing
Reexamination Certificate
2005-07-19
2009-12-22
Dye, Rena L (Department: 1794)
Stock material or miscellaneous articles
Hollow or container type article
Polymer or resin containing
C428S034100, C428S035200, C428S035300, C428S035400, C428S035800, C428S035900, C428S036600
Reexamination Certificate
active
07635509
ABSTRACT:
Multilayer film webs having a layer of an oxygen-permeable composition that is a blend of i) an organic acid or organic acid salt, ii) a copolymer of a) ethylene, b) an C3to C8α,β-ethylenically unsaturated carboxylic acid, and optionally c) an alkyl acrylate or alkyl methacrylate comonomer, where greater than 70% of the total acid moieties of (i) plus (ii) are neutralized to the corresponding metal salts, and iii) at least one additional ethylene-containing polymer selected from the group consisting of ethylene homopolymers and ethylene copolymers other than ethylene acid copolymers and ionomers are used to form packaging materials in a process in which a packaging structure is provided that includes the multilayer film web, a vacuum is applied to the packaging structure, and the perimeters of the film web layers are heat sealed.
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International Search Report for PCT/US2006/028069, dated Dec. 14, 2006.
Aughenbaugh Walter B
Dye Rena L
E.I. du Pont de Nemours and Company
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