Disposable ophthalmic/medical apparatus with timed color change indication
US8388131B2 · kind B2 · utility
13Cited by
15References
63Claims
0Family size
Inventors
Key dates
| Filing date | Jul 16, 2009 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Mar 19, 2031 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/583
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.