Although, the length of utility and plant patent protection (patent term) was previously seventeen years from the date of patent grant, utility and plant patents filed after June 8, 1995 now have a patent term of up to twenty years from the date of filing of the earliest related patent application. Utility and plant patents which were applied for prior to June 8, 1995, and which were or will be in force after June 8, 1995, now have a patent term of seventeen years from the date of patent grant or twenty years from the date of filing of the earliest related patent application, whichever is longer. Utility patents are subject to the payment of periodic maintenance fees to keep the patent in force. Patent terms can be extended under some specific circumstances. See the U.S. Code Title 35 - Patents for a full description of patent laws.
The Japanese commissioner in Washington DC in the 1900's studying the American patent system said, "We have looked about us to see what nations are the greatest, so that we can be like them... We said, 'What makes the United States such a great nation?' and we investigated and found that it was patents, and we will have patents."
Although anyone can claim to inventor or create something (e.g., Al Gore created the Internet), the reality is that an idea needs to be carefully considered in context of the law. If you are serious about protecting your invention, you should contact a patent attorney or patent agent. Applying for a patent, and its subsequent patent prosecution process, does cost money. You may see ads for low-cost services to file a patent on your behalf. Such solutions are viable if your goal is to boast to your friends that you patented something. However, if you have real-world business ambitions, it is imperative that the person writing the claims of your patent is a well-qualified lawyer. The adage "you get what you pay for" is very true in the intellectual property community. Realistically, a single patent is going to minimally cost you around $10K for the application fees, legal fees to write the claims, and so on. You want to find a legal professional that is a subject matter expert in your domain (whether it is IT, manufacturing, mechanical engineering, biotech).
Joseph Schumpeter, known as the Prophet of Innovation, describes the importance of inventors in his Theory of Economic Development. Inventors are the "fiery-spirits" that disrupt the status quo with their vision of doing things 'better, faster, cheaper.' In the process, their inventions represent "the heroic intervention of individual men (or women) who appear as leaders toward new economic shores." We believe that intellectual assets, commonly taking the form of patented technology, are the least-understood and most-relevant resources to stimulate economic development through innovation. To make this happen, intellectual property (IP) needs to be more comprehensively understood so that better business decisions can be executed. This is why we are in business. An invention must have economic utility to benefit society. Some times, inventions are way before their time. However, most of the time, the business execution to commercialize the invention fails. In fact, those that conceptualize the invention rarely reap the rewards of the innovation's ultimate success.