A patent[1] is the registered legal ownership of an original and useful invention.
Typical costs:
Before applying for a patent, you need to search to see if your invention is already patented. You can do that for free through the US Patent and Trademark Office (USPTO)[2] ; The University of Texas provides a free online tutorial for using this search site. Google.com[3] also offers a free, user-friendly search of the USPTO records.
Depending on the complexity of the invention or design, patent agents charge $400-600 for a comprehensive patent search, while patent attorneys fees range from $500-$1,700 for a search and an opinion letter about the legality of the proposed patent.
For utility patents, the federal government charges about $500 in filing fees for individual inventors (it's twice as much for large corporations), an issue fee of $700 if the patent is approved, and three periodic maintenance fees of $450, $1,150 and $1,900$75 discount.
Computer software programs for drafting and filing your own US patent application include PatentEase[4] for $260-$349 and Patent Pending Now! ($130-$200), by Nolo Press, which also sells do-it-yourself patent workbooks ($19-$43), including the popular Patent It Yourself[5] series.
Depending on the technical complexity of the subject, patent agents charge $600-$1,400 to prepare and process an application for a simple design or a straightforward mechanical device, such as a hand-operated kitchen utensil or a basic toy with few or no moving parts; $2,500-$4,500 for average complexity, such as a small electronic device or an innovative cog for an assembly line; and $3,500-$15,000 or more for complex projects such as chemical or biotechnological patents. Computer software patents can be simple, moderately complex or extremely complex, depending on the nature of the application.
Rates for patent attorneys to prepare a patent application and defend it during the approval process range from $3,500 to $25,000 or more, depending on the complexity. Attorneys fees may be based on hourly rates of $150-$400, depending on the services provided. IPWatchdog.com[6] gives an overview of possible patent costs.
The USPTO[7] answers frequently asked questions about patents and gives a detailed glossary of patent-related terms[8] . Generally patent ownership lasts for 20 years from the date of filing an application.
The Entrepreneur's Help Page[9] gives a concise overview of patents.
Every nation has its own patent laws; to protect your patent outside the United States you must file a patent application in each country. The US is a member of the Patent Cooperation Treaty[10] , which provides centralized filing procedures and a standardized format when applying for the same patent in any of 124 countries. The USPTO gives links to other countries' patent offices[11] and the United Nations' World Intellectual Property Organization[12] lists details on international patent classifications.
Additional costs:
After you file your application, the USPTO does an exhaustive search to see if there are any existing patents that conflict with your proposed invention or design. This is generally a much more extensive search than the preliminary one done by you, your agent or attorney. If the USPTO finds a conflicting patent in existence, your application will be denied, and the fees are not refundable.
If your patent application is denied, you can appeal the decision, but this can add $2,000-$10,000 or more to your attorney's fees.
Shopping for a patent:
While inventors can prepare and file their own patent applications, the USPTO[13] suggests it is a complex and detailed legal process which may require the services of a licensed patent attorney or agent. If you use an attorney or agent, the USPTO only deals directly with your legal representative.
There's an online database of all attorneys and agents licensed to practice before the USPTO[14] . Once you've located the names of local attorneys, you can search that same database to see exactly how many patents they worked on that have actually been approved.
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