Getting a patent is expensive and time-consuming, so don't just start filling out an application as soon as you come up with a bright idea. John Calvert, the administrator for the U.S. Patent and Trademark Office's Inventor Assistance Program, offers advice on whether it's truly worth it.
Be careful of invention-marketing Web sites: the U.S. Patent Office lists complaints about 60 such sites that make money by exploiting inventors. That said, some of the best help you can get is at your computer. Here are four of the most useful sites.
uspto.gov and google.com/patents
To avoid overlapping with an invention that has already been patented, search the official government site and the more beginner-friendly Google Patent Search.
edisonnation.com
A social network where you can find other groups of inventors by field or region and take advantage of the wide membership. Survey people by posting a question, or start your own group.
uiausa.org
The nonprofit United Inventors Association offers a 10-part educational series on topics such as licensing deals, financing, market research, avoiding scams, and other need-to-know basics.
web.mit.edu/invent
The Lemelson-MIT Program's handbook provides help with issues like how to prove an idea is yours, developing a solid business plan, and deciding whether your invention is worth patenting.
Loose lips can sink potential inventions. So be very careful about sharing proprietary information. Anytime you write about your invention on the Web or in a published article, display it at a trade show, or make it public in certain other ways, that could qualify as a legal disclosure. From that moment on, you have only a one-year grace period to file for a patent; if you don't, you lose the claim rights, and anyone else can try to patent it. Louis Foreman, author of the upcoming Independent Inventor's Handbook, suggests that you have anyone you discuss the invention with sign a nondisclosure agreement, a legally binding document in which the signer agrees to keep mum. You can download a sample NDA on our Web site at popsci.com/nda
Before you start dreaming of an early retirement in Tahiti, you need to face facts: Most inventors don't get wealthy from their idea. Selling your invention to a major company will usually get you 2 to 4 percent of the gross sales as a licensing fee. If licensing isn't an option, you can try taking it to market yourself. That route is riskier and can be hugely expensive — anywhere from $20,000 to $200,000 for development, to thousands more for production — but you can make 40 to 50 percent margins.
From the time you come up with an idea, expect to spend 50 to 70 percent of your time raising capital from angel investors, says Ellen Sandles, executive director of the Tri-State Private Investors Network. Here's what you need to know to get the big check.
Updates from some of last year's laureates.



Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.


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These days you can do the whole patent process online, internationally. Even applying for a US Provisional patent is not the cheapest way to go, apply for a UK patent and you get a year to pay any fees and your UK Filing Date is good for your Non-Provisional US Patent. Therefore if nobody is interested in a year, just abandon your patent and it has cost you nothing. If someone is interested the royalty advance can pay the fees. A great cheap Amazon ebook which explains all this is DIY Patent Online - you can read some of it free. They also have a website but aren't trying to sell their services, just telling you how to patent without an attorney. You can bet if anybody rubbishes this comment they are an attorney.