Invention Grant
- Patent Title: Methods for incorporating ultraviolet light absorbing compounds into anodic oxides
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Application No.: US14161482Application Date: 2014-01-22
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Publication No.: US09725819B2Publication Date: 2017-08-08
- Inventor: Jude Mary Runge , Patrick S. Wieler , John Murray Thornton, III , Max A. Maloney
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: APPLE INC.
- Current Assignee: APPLE INC.
- Current Assignee Address: US CA Cupertino
- Agency: Downey Brand, LLP
- Main IPC: C25D11/02
- IPC: C25D11/02 ; C25D11/24 ; C25D11/26 ; C25D11/30 ; C25D11/34

Abstract:
The embodiments described herein relate to anodic oxides and methods for forming anodic oxides. The methods involve incorporating an ultraviolet (UV) light absorbing compounds into anodic oxides to prevent color fading of the anodic oxides caused by exposure to UV light. In some embodiments, the UV light absorbing compound includes para-aminobenzoic acid (PABA). The UV light absorbing compound can be incorporated within the anodic oxide during a sealing process. The UV light absorbing compound becomes infused within a seal layer, which is formed during the sealing process. The resultant anodic oxide has a UV light absorbing seal layer that can block UV light from reaching any underlying colorant existing within the anodic oxide.
Public/Granted literature
- US20150093563A1 METHODS FOR INCORPORATING ULTRAVIOLET LIGHT ABSORBING COMPOUNDS INTO ANODIC OXIDES Public/Granted day:2015-04-02
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