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. 20, 2026
Filed:
Apr. 05, 2023
B&t Entwicklungs-und Vermarktungsgesellschaft Mbh, Hamburg, DE;
Werner Balkau, Glarus-Süd / Schwändi, CH;
Kurt Kronawittleithner, Horgen, CH;
B&T ENTWICKLUNGS- UND VERMARKTUNGSGESELLSCHAFT MBH, Hamburg, DE;
Abstract
A pressure-relief valve includes a cup shaped main body with a bottom and a circumferential wall to be fastened to a flexible package material. The bottom has at least one through hole forming a passage through the main body. A valve membrane lies against the main body on a package side in a region around the through hole(s), with a sealing liquid between the main body and the valve membrane. The valve membrane thereby covers the at least one through hole. On the package side, the bottom has a system of grease grooves for accommodating a portion of the sealing liquid, the system of grease grooves comprising at least one outer grease groove having a main portion running in a circumferential direction and having a radial extension extending from the main portion into a radial direction.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile