law: Patents Act, 1970
  3.What are not inventions 
  The following are not inventions within the meaning of this
  
  Act,- 
  (a) an invention which is frivolous or which claims anything
  
  obviously contrary to well established natural laws;
  (b) an invention the primary or intended use of which would be
  
  contrary to law or morality or injurious to public health;
  (c) the mere discovery of a scientific principle or the
  
  formulation of an abstract  theory;
  (d) the mere discovery of any new property or new use for a
  
  known substance or of the mere use of a known process, machine or apparatus
  
  unless such known process results in a new product or employs at least one new
  
  reactant;
  (e) a substance obtained by a mere admixture resulting only in
  
  the aggregation of the properties of the components thereof or a process for
  
  producing such substance;
  (f) the mere arrangement or re-arrangement or duplication of
  
  known devices each functioning independently of one another in a known way;
  (g) a method or process of testing applicable during the process
  
  of manufacture for rendering the machine, apparatus or other equipment more
  
  efficient or for the improvement or restoration of the existing machine,
  
  apparatus or other equipment or for the improvement or control of manufacture;
  (h) a method of agriculture or horticulture;
  (i) any process for the medicinal, surgical, curative,
  
  prophylactic or other treatment of human beings or any process for a similar
  
  treatment of animals or plants to render them free of disease or to increase
  
  their economic value or that of their products.