Color changing correction fluid
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 28, 2008
Grant Date -
Apr 7, 2005
app pub date -
Feb 11, 2004
filing date -
Oct 2, 2003
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved color changing correction fluid is provided which includes either a volatile base or a volatile acid in combination with a color changing pH indicator, all in a water based fluid or system. As the fluid dries, the volatile base or acid evaporates along with the water and the pH color changing indicator changes from a colored state to a clear state. For white paper, a white pigment is utilized and therefore the fluid changes from a colored state to a white finished state as the solvent water and acid or base evaporates. Different color pigments can be utilized to match the color of the particular paper or substrate.
First Claim
Other Claims data not available
