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:
Aug. 01, 2017
Filed:
Mar. 11, 2014
Applicant:
Siemens Aktiengesellschaft, München, DE;
Inventors:
Assignee:
SIEMENS AKTIENGESELLSCHAFT, Munich, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01B 1/20 (2006.01); C08J 5/24 (2006.01); D21H 17/45 (2006.01); D21H 17/56 (2006.01); H01B 3/18 (2006.01); H01B 3/30 (2006.01);
U.S. Cl.
CPC ...
C08J 5/24 (2013.01); D21H 17/45 (2013.01); D21H 17/56 (2013.01); H01B 1/20 (2013.01); H01B 3/185 (2013.01); H01B 3/303 (2013.01); C08J 2379/04 (2013.01);
Abstract
Cellulose fibers are impregnated with polyethyleneimine so that the impregnation forms a type of network, which can reduce the specific resistance of the cellulose material owing to the electrical conductivity of the network. The cellulose material can thereby be advantageously adapted to use as electrical insulation of transformers, the cellulose material in this case being soaked in transformer oil. An adaptation of the specific resistance of the cellulose material to the specific resistance of the oil lead to improved dielectric strength of the transformer insulation. A method for impregnation of the cellulose material is described.