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. 06, 2024
Filed:
Apr. 13, 2020
Life Safety Distribution Ag, Hegnau, CH;
Christa Dumschat, Wismar, DE;
Life Safety Distribution AG, Hegnau, CH;
Abstract
A lead-free galvanic oxygen sensor having an aqueous electrolyte and a bismuth anode is disclosed. The electrolyte contains a polyol in addition to water and a salt. Surprisingly, a sensor with such an electrolyte has an increased resistance to passivation. The suppressed passivation of the bismuth anode leads to a sensor lifespan, in some instances, of greater than 100 days. The polyol can be added in the amount of between 20% and 30%. The polyol can comprise D-sorbitol, meso-erythritol, or glycerol. In some instances, the polyol in the electrolyte can increase the time until a sudden rise in potential for the sensor, while maintaining a constant current on the bismuth anode, of greater than 14 minutes.