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:
Mar. 24, 2026
Filed:
Dec. 09, 2019
Famlee Fund Gmbh, Freiburg, DE;
Rudolf Johannes Ehwald, Müncheberg, DE;
Helge Adleff, Berlin, DE;
Famlee Fund GmbH, Freiburg, DE;
Abstract
A dispenser for receiving and evaporating a liquid formic acid preparation for combatting varroa mites in a bee hive, the dispenser including an evaporation surface, an evaporation container; a storage container connected to the evaporation container and sealed from the outside in a vapour-tight manner for storing an entire treatment dose of the liquid formic acid preparation; a closable liquid-conducting connection between the storage container and the evaporation container for transferring the liquid formic acid preparation from the storage container to the evaporation container; wherein the evaporation surface is a gas-permeable, fine-pored membrane with a solid content of less than 70% and continuous, exclusively gas-filled pores with a width of between 10 nm and 1000 nm as part of an outer boundary of the evaporation container, the membrane impermeable to liquid mixtures of formic acid and water and liquid-tight under the dynamic pressure of the liquid formic acid preparation.