Heat activated indica on textiles
US4725462A · kind A · utility
71Cited by
8References
5Claims
0Family size
Inventor
Key dates
| Filing date | Jul 2, 1985 |
| Grant date | Feb 16, 1988 |
| Priority date | — |
| Expiry date | Jul 2, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S428/913
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A woven fabric textile (10) in the form of a washcloth (12) or other fabric article having indica (16) in the form of a hidden message or symbol imprinted on its major surface. The indica is not visible to the naked eye under normal ambient temperatures. However, when the washcloth (12) is subjected to temperatures above 108 degrees F. (42 degrees C.), such as when emersed in bath water, the hidden indica (16) appears to the user. The indica (16) consists of a blend of conventional ink and a substance known by its tradename MATSUMIN THERMOCHROMATIC COLOR.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.