The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 13, 2004
Filed:
Jan. 18, 2001
Applicant:
Inventors:
Hannu Karhuketo, Valkeakoski, FI;
Heikki Korpela, Valkeakoski, FI;
Assignee:
UPM-Kymmene Corporation, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 2/708 ; B32B 2/710 ; B32B 2/734 ; B32B 2/736 ;
U.S. Cl.
CPC ...
B32B 2/708 ; B32B 2/710 ; B32B 2/734 ; B32B 2/736 ;
Abstract
The lid structure for a food packaging container comprises a paper-based body layer and, on the side that is to be against the packaging container, plastic layers that function as a barrier and as heat-sealable layers. The lid structure comprises, as the plastic layers attached to the body layer, one or more layers of biodegradable plastic, such as polylactide and/or polyhydroxy alkanoate and on their outer side, the outermost layer, which is formed of biodegradable ester copolymer, to whose ester parts a comonomer has been linked by ester or amide bonds.