Assertion: phosphoric acid's amount | /r/HasProperty | employed in the practice of this invention
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Source sentences:
text: Generally, the amount of condensed phosphoric acid, or the ammonium or alkali metal salt thereof, etc., expressed in parts P to be employed in the practice of this invention will be a minor amount and commonly fall in the range between about 1 and 20 parts by weight per 100 parts by weight of the wet-process acid or neutralized solution thereof.