发明名称 |
ELAPSED TIME INDICATOR FOR CONTROLLED ENVIRONMENTS AND METHOD OF USE |
摘要 |
Exposure time is determined by a device which is sensitive to an environmental substance in a controlled environment. Embodiments include a humidity sensitive timer treated with a cobalt salt which changes colors after a certain exposure time within the controlled environment. Elapsed time is measured by exposing the timer to a humidity controlled environment and monitoring the timer for a change in color.
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申请公布号 |
US2002000184(A1) |
申请公布日期 |
2002.01.03 |
申请号 |
US19980199349 |
申请日期 |
1998.11.25 |
申请人 |
PATON ERIC;MANI BALARAMAN |
发明人 |
PATON ERIC;MANI BALARAMAN |
分类号 |
G01N31/22;G04F1/00;(IPC1-7):G04F1/00 |
主分类号 |
G01N31/22 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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