发明名称 EXPIRATION WARNING PATCH FOR GAS EXPIRATION DATE MANAGEMENT
摘要 Embodiments of the invention provide devices and methods for determining the state of content contained within a vessel. Embodiments of the invention provide passive status indicators which change state relative to the lifetime of the content contained within the vessel. In one embodiment t he status indicator may be a layered adhesive structure attached to the vessel which changes visibly over time relative to the lifetime of the fluid contained within the vessel. For example, the layered structure may change its color with time. In another embodiment, the status indicator may be an electronic timer attached to the vessel and to at least one of a plurality of indicator s. The electronic timer may be configured to notify the user or users of t he compressed fluid of the age of the compressed gas via the indicators.</SDOAB >
申请公布号 CA2547049(C) 申请公布日期 2009.09.01
申请号 CA20062547049 申请日期 2006.05.15
申请人 L'AIR LIQUIDE - SOCIETE ANONYME A DIRECTOIRE ET CONSEIL DE SURVEILLANCE POUR 发明人 PARIAS, THOMAS
分类号 F17C13/02;A61J1/18;G04F1/00 主分类号 F17C13/02
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