pH colour indicator for use with agricultural compounds
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United States of America Patent
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Issued Date -
Mar 3, 2005
app pub date -
Aug 25, 2003
filing date -
Aug 25, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
This invention discloses a new class of pH indicators suitable for use in agricultural compounds. The class comprises naturally occurring substances which are extracts from grape skins, cabbage and lecithin. Safety concerns are now causing regulatory bodies to prohibit use of chemical pH indicators in compounds which are used for crops and animals. The naturally occurring compounds of this invention satisfy these concerns of the regulators and function as well as chemical indicators of the prior art.
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