Process for making soluble coffee concentrate

Claim 1

THE PROCESS OF PRODUCING A SOLUBLE COFFEE WHICH COMPRISES EXTRACTING SOLUBLE COFFEE SOLIDS FROM ROASTED, FRESHLY GROUND COFFEE BY PASSING WATER THROUGH SAID COFFEE; TREATING AT LEAST A PORTION OF THE EXTRACTED COFFEE GROUNDS TO REMOVE ADDITIONAL SOLUBLE COFFEE SOLIDS BY HYDROLYZING SAID GROUNDS TO CREATE AN ESSENTIALLLY TASTELESS HYDROLYSIS PRODUCT, SAID HYDROLYSIS STEP COMPRISING THE STEPS OF HYDROLYZING SAID SPEND COFFEE GROUNDS IN AN AQUEOUS PHOSPHORIC ACID SOLUTION HAVING A PH OF ABOUT 1.5 TO 2.0, SEPARATING SAID SPEND GROUNDS FROM SAID SOLUTION, ADDING A FIRST NEUTRALIZING AGENT, FROM THE GROUP CONSISTING OF THE STRONGLY BASIC CALCIUM AND MAGNESIUM COMPOUNDS, TO SAID SOLUTION TO CONVERT MOST OF SAID PHOSPHORIC ACID TO AN INSOLUBLE PRECIPITATE, ADDING A SECOND NEUTRALIZING AGENT, FROM THE GROUP OF CALCIUM AND MAGNESIUM COMPOUNDS WHICH ARE ESSENTIALLY NEUTRAL, TO CONVERT THE REMAINDER OF SAID PHORPHORIC ACID TO AN INSOLUBLE PRECIPITATE, SEPARATING THE RESULTING PRECIPITATE AND ANY UNDISSOLVED NEUTRALIZING AGENT FROM SAID SOLUTION, PURIFYING SAID SOLUTION TO PROVIDE A SUBSTANTIALLY TASTELESS SOLUTION CONTAINING SUBSTANTIALLY NO INSOLUBLE SOLIDS; CONCENTRATING SAID TASTELESS SOLUTION TO PROVIDE A SOLUBLE SOLIDS CONCENTRATION ON THE ORDER OF THE SOLUBLE SOLIDS CONCENTRATION OF SAID WATER EXTRACT; MIXING SAID CONCENTRATED TASTELESS SOLUTION WITH SAID EXTRACT; AND DRYING SAID MIXTURE TO REMOVE SUBSTANTIALLY ALL OF THE WATER THEREFROM.