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:
Nov. 23, 2004
Filed:
Jul. 20, 2001
Applicant:
Inventors:
Herbert Gord, Ingelheim, DE;
Klaus-Dieter Hammer, Mainz, DE;
Rainer Neeff, Wiesbaden, DE;
Klaus Berghof, Rudolstadt-Schwarza, DE;
Markus Eilers, Rudolstadt-Schwarza, DE;
Reinhard Maron, Rudolstadt-Schwarza, DE;
Assignee:
Kalle GmbH & Co. KG, Wiesbaden, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B 1/08 ;
U.S. Cl.
CPC ...
B32B 1/08 ;
Abstract
The present invention provides a seamless tubular film on a cellulose base, being produced by extruding an aqueous cellulose N-methyl-morpholine-N-oxide spinning solution. The maximum degree of roughness R is from greater than 0.1 &mgr;m to 0.5 &mgr;m and an average degree of roughness R is from 0.005 to 0.014 &mgr;m. On the surface of the tubular film is formed in contact with an electrolyte an electrokinetic potential, the size of which depends on the pH value of the electrolyte.