Invention Grant
- Patent Title: Disposable ophthalmic/medical apparatus with timed color change indication
-
Application No.: US12504107Application Date: 2009-07-16
-
Publication No.: US08388131B2Publication Date: 2013-03-05
- Inventor: Gregory Lee Heacock , Louise Ellen Culham
- Applicant: Gregory Lee Heacock , Louise Ellen Culham
- Agency: McAndrews, Held & Malloy Ltd.
- Main IPC: G02C7/00
- IPC: G02C7/00 ; G02C7/02
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.
Public/Granted literature
- US20090303440A1 DISPOSABLE OPHTHALMIC/MEDICAL APPARATUS WITH TIMED COLOR CHANGE INDICATION Public/Granted day:2009-12-10
Information query
