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:
Oct. 12, 1993
Filed:
Jan. 22, 1992
Applicant:
Inventors:
Robert Schmidt, Walluf, DE;
Peter Eiden, Bad Homburg, DE;
Gerhard Koch, Mandelbachtal, DE;
Karl-Heinz Mueller, Schiffweiler, DE;
Assignee:
Hoechst Aktiengesellschaft, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428334 ; 428461 ; 428409 ; 428379 ; 428516 ; 361323 ; 2642902 ; 154229 ;
Abstract
A biaxially stretched polypropylene monofilm, wherein the surfaces of the two sides of the polypropylene monofilm have different roughnesses R.sub.Z, is employed as an insulation film for the production of capacitors. The smoother of the two surfaces of the polypropylene monofilm is substantially free from fibrils and pits, so that no flaws occur in a metal layer applied on metallization of this surface.