What Does Useful Mean?
The patent law specifies that inventions must be useful, which means have a useful purpose. Being useful also includes operativeness, meaning that an invention must operate or perform its intended purpose.USPTO Fees
The USPTO charges fees at every step of the patent process and these fees are the only fixed cost in the process. The USPTO charges a required $330 to file an application, $540 for a search, $220 for an examination, $1,510 to issue the patent if it passes the examination, plus $7,750 in maintenance fees over the 20 years that the patent is in force. Hence, the total to file and go through the process is $1,090, but the total to receive the patent and keep it in force is $10,350. Note that independent inventors and small businesses receive a 50 percent discount on fees but that the USPTO charges more for extra or late paperwork.Turning an Invention Idea into Money - How Do I Conduct a Patent Search for Prior Art?
A patent search is part of your search for prior art (no, not paintings.) Prior art is any body of knowledge that relates to your invention. Prior art would include previous patents, trade journal articles, publications (including data books and catalogs), public discussions, trade shows, or public use or sales anywhere in the world. As discussed previously, the search for prior art helps prove the novel and nonobvious legal conditions that are required for a patent to be granted.Provisional Application
If you have a patentable invention, filing a provisional patent application can provide temporary protection of your intellectual property rights while you develop your idea further or seek funding. Provisional applications have a lower fee than non-provisional applications -- and you don't have to make formal claims or provide the same level of detail about your invention. Additionally, provisional applicants don't have to wait for the USPTO to examine the contents of the application. Your provisional application is valid 12 months from the date you file it -- and you can use the phrase "patent pending" in connection with your invention during that time.What is reissue?
Patent law states "On taking up an application for examination or a patent in a reexamination proceeding, the examiner shall make a thorough study thereof and shall make a thorough investigation of the available prior art relating to the subject matter of the claimed invention." This means that prior art could disqualify your application for a patent.