To be entitled to a patent, a claimed invention must satisfy certain patentability requirements. Perhaps the most basic requirement is that the subject matter sought to be patented is in fact eligible for patent protection. In addition, the invention must meet other patentability requirements, including novelty, non-obviousness, written description, and enablement. Business methods are defined as an innovative way of completing a matter or doing an activity and in the patent context, a business method fall under the subject matter process and not under machine, manufacture and composition of matter. This article makes a study of the legal delienation of business methods as patent eligible subject matter specially in the light of this decade’s quartet Section101 decisions delivered by Supreme Court of USA. a) The first part of the article provides the introduction, then it proceeds b) to examine the international standards of patent eligibility, c) thirdly it tries to situate the business methods patents in the US patent code and then analyses the quartet of cases decided by the S.C and then lastly d) ponders on bringing predictability to the law of patents.