Pressure sensitive reproducing material
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Dec 3, 1991
Issued Date -
N/A
app pub date -
May 16, 1989
filing date -
Oct 8, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The object of the present invention is to provide a pressure sensitive reproducing material which allows reproduced letters or patterns to fade away automatically with the passage of time. The present invention accomplished the object by a pressure sensitive reproducing material composed of a colored material supported on a substrate, in which the colored material comprises a phthalein group indicator which is color-developed by an inorganic weakly basic substance jointly used with an organic amine and contains hygroscopic material or drying inhibitor.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully