Apparatus with timed color change indication

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United States of America Patent

PATENT NO 9752902
SERIAL NO

14847182

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Importance

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Abstract

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A disposable ophthalmic or medical apparatus 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 apparatus should no longer be used.

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Patent Owner(s)

Patent OwnerAddress
THERMOGRAPHIC MEASUREMENTS LIMITEDCH5 4DS FLINTSHIRE

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Culham, Louise Ellen Maple Valley, US 7 92
Heacock, Gregory Lee Maple Valley, US 22 532

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