Southern Phosphate Corp. v. Phosphate Recovery Corp.

The patent sub judice deals with a method of recovering phosphates. As has been stated, phosphates form deposits in certain areas of Florida where they lie buried beneath a few feet of sandy soil. The covering of earth is removed, the phosphate-bearing deposits are broken down by streams of water and the phosphates themselves with the soil are piped to washing plants where some of the phosphate particles are removed from the waste materials by screening. Only about 50 per cent, of the phosphate material that is so -mined is recoverable. The smaller particles of phosphate material pass through…