Mark Stewart Houston-McMillan;Martin David Bloomberg
发明人:
Martin David Bloomberg,Mark Stewart Houston-McMillan
申请号：
US10570048
公开号：
US10145803B2
申请日:
2004.08.24
申请国别(地区):
US
年份:
2018
代理人:
摘要：
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.
