Apparatus with timed color change indication
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United States of America Patent
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Nov 7, 2017
Grant Date -
Dec 3, 2015
app pub date -
Aug 10, 2015
filing date -
Nov 30, 2006
priority date (Note) -
In Force
status (Latency Note)
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Abstract
An apparatus with time controlled color change indication comprises an apparatus includes a disposable, limited or restricted use product and an oxygen sensing color changeable dye disposed on a portion of the apparatus, the dye being translucent or having a first color upon application and for a defined time thereafter and the dye changing color after exposure to oxygen for the defined time. For example, a packaging for containing a product for human consumption has a portion with a color changeable dye disposed thereon. The dye changes color after being exposed to oxygen for a controlled and predetermined period of time indicating that the product for human consumption should no longer be consume or has decreased in freshness, quality of taste or potency.
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International Classification(s)
- A61K:PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOS....
- G01N:INVESTIGATING OR ANALYSING MATERIALS BY DETERMININ....
- A61B:DIAGNOSIS; SURGERY; IDENTIFICATION
- G02C:SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY ....
- G01D:MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VAR....
- A61M:DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE B....
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