You cannot get a patent for:

  1. Mathematical formula
  2. Law of nature
  3. The scientific principle has no functional application.
  4. Naturally occurring substance
  5. Inventions with only illegal usage
  6. Unsafe pharmaceuticals
  7. Ways of conducting surgery on people
  8. Printed materials without distinctive shapes or structure

For Creative work, such as a song, a movie, or a novel, the appropriate form of protection would be a copyright, rather than a patent.