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. 11, 2002
Filed:
Dec. 21, 1999
Applicant:
Inventors:
Hellmut Bünsch, Hamburg, DE;
Klaus Heinrich Ihmels, Hamburg, DE;
Frank Otto Theubert, Norderstedt, DE;
Assignee:
Daramic, Inc., North Charleston, SC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01M 2/16 ;
U.S. Cl.
CPC ...
H01M 2/16 ;
Abstract
An invention is described through which it is possible to reduce in quantity the coloured, mostly dark, and frequently adhesive deposits which form in lead accumulators with separators of filled poly-olefins during formation and operation. The essential feature is that the separators contain as plasticizer a process oil with a C value of ≦6%, a sulphur content of ≦2000 ppm and a polar part of ≦1%. Preferred process oils to be used as plasticizers are relatively naphthenic and naphthenic oils.