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:
Sep. 15, 2026
Filed:
Aug. 22, 2022
Hitachi Energy Ltd, Zürich, CH;
Markus Keller, Winterthur, CH;
Urs Kruesi, Wiesendangen, CH;
Loic Fave, Fribourg, CH;
Johannes Hengstler, Lufingen, CH;
Moritz Boehm, Mellingen, CH;
Roman Kochetov, Glattfelden, CH;
HITACHI ENERGY LTD, Zürich, CH;
Abstract
The disclosure relates to a gas insulated electric apparatus, which includes an enclosure, an electric high voltage appliance arranged inside the enclosure and a permeation barrier arranged within the enclosure and circumferentially surrounding the electric high voltage appliance, whereby the enclosure contains an insulation gas including at least 70% by volume of COand including an elevated and pre-determined operating gas pressure level, and the permeation barrier includes a permeation layer surrounded on at least one side by a flow promoter layer and/or a surface activation and/or primer layer.