Q. How to obtain a business patent?
I'm not sure exactly which type of patent you're interested in. Perhaps it is a business method patent? You'll find information about those patents here: http://www.uspto.gov/patents-getting-started/patent-basics/types-patent-applications/utility-patent/patent-business
For a general overview of the patent process, check out this link: http://www.uspto.gov/patents-getting-started/patent-basics/types-patent-applications/utility-patent/patent-process-0
I can also recommend the Patents research guide from MIT libraries at http://libguides.mit.edu/content.php?pid=239146&sid=1973230 .
Sometimes people get the terms "patent," "copyright," and "trademark" confused. This site explains the difference: http://www.uspto.gov/trademarks-getting-started/trademark-basics/trademark-patent-or-copyright For more on trademarks, see this site: http://www.uspto.gov/trademarks/. For more on copyright, go to http://www.copyright.gov/.