Anti-photocopying paper and/or anti-telefacsimile paper
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 19, 1989
Grant Date -
N/A
app pub date -
Feb 24, 1988
filing date -
Feb 27, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Paper is provided with resistance to photocopying or transmission by telefacsimile by spatial spectral modulation of the paper reflectance at a specific single or preferably multiple frequencies. Such paper has a colored pattern of at least two colors repeating in at least one dimension of a face of a paper with at least one frequency in the range of from about 0.5 to about 50 times per cm. The colors contrast with black or similar dark color to permit black or similar dark colored information to be visible readable when applied to the colored pattern. The colors also cooperate with such information to provide a document resistant to photocopying and transmission by telefacsimile.
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