Application of Frederick A. Hessel

WORLEY, Chief Judge.

This is an appeal from the decision of the Board of Appeals which affirmed the examiner’s rejection of claims 1 and 2 in appellant’s application 1 for “Secondary Recovery Method.”

It appears that economical recovery of oil from oil-bearing sands by natural flow or usual pumping methods is often hindered by (1) a decrease in the natural gas pressure in the oil formation which drives the oil toward the well, and (2) absorption of certain residual amounts of oil upon the sand particles. To obviate that problem the prior art has employed water flooding techniques in which water…