Invention Grant
US06793721B2 Invisible ink composition and method to ensure document confidentiality
有权
隐形墨水组合和方法确保文件的保密性
- Patent Title: Invisible ink composition and method to ensure document confidentiality
- Patent Title (中): 隐形墨水组合和方法确保文件的保密性
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Application No.: US10293603Application Date: 2002-11-14
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Publication No.: US06793721B2Publication Date: 2004-09-21
- Inventor: Yu-Chang Shen , In-Shan Sir , Chia-Hsin Chien , Yu-Ting Lin
- Applicant: Yu-Chang Shen , In-Shan Sir , Chia-Hsin Chien , Yu-Ting Lin
- Priority: TW90128261A 20011114
- Main IPC: C09D1100
- IPC: C09D1100
Abstract:
An invisible ink composition and a method to ensure document confidentiality. The invisible ink composition includes a carrier as a solvent; and at least one leuco dye evenly dispersing in the carrier. The invisible ink becomes visible while the leuco dye is combined with a weak acidic developer.
Public/Granted literature
- US20030089270A1 Invisible ink composition and method to ensure document confidentiality Public/Granted day:2003-05-15
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