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:
Jun. 06, 1995
Filed:
May. 27, 1992
Applicant:
Inventors:
Hans Johansson, Veberod, SE;
Paul W Ackermann, Leinfelden-Echterdingen, DE;
Assignee:
Tetra Laval Holdings & Finance SA, Pully, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B02C / ;
U.S. Cl.
CPC ...
241 20 ; 241 24 ; 241D / ;
Abstract
A method of recovering individual material components such as metal, plastic and, where applicable, paper or cardboard, from waste of laminated packaging material comprising layers of metal, plastic and possibly paper or cardboard. The layers of metal and plastic are separated from each other and from the possibly present paper or cardboard layer by treating the waste with an organic acid or a mixture of organic acids selected from among formic acid, acetic acid, propanoic acid, butyric acid and similar volatile organic acids, preferably acetic acid alone.