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It depends on a number of factors including: what type of patent (design, utility, plant, etc), when it was filed (its earliest priority date), when it was issued, where it was issued (which country), whether it remains valid (if it ever wa...
http://wiki.answers.com/Q/How_long_does_a_patent_last
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Utility and plant patents are granted for a term which begins with the date of the grant and usually ends 20 years from the date the applications were filed. You must make the timely payment of the appropriate .
http://inventors.about.com/od/inventing101patents/f/pro...
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Plant and utility patents last for 20 years, while design patents last for 14 years, after which the patent falls into public domain. As long as an inventor holds a patent, he has what is known as the "right of exclusion." This ri...
http://www.ehow.com/about_5304457_patent.html
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The point of all this is: how long should the term of a patent be? Taking a particular invention, we can answer the question pretty precisely, at least in principle. The term should be long enough to make the design work to create the invention a profitable investment, and no longer.
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william-king.www.drexel.edu/top/prin/txt/infoch/inf6.ht...
william-king.www.drexel.edu/top/prin/txt/infoch/inf6.html
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Find information on patent duration periods and answers to such questions as, 'How long does a patent last?, How long is a patent good for?, How long do patents last?, What is the length of time a patent can be held?, Is the duration of a patent 7 years, 17 years, 14 years or 20 years? ... How long does a patent last? |
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www.inventionstatistics.com/Patent_Protection_Time_Peri...
www.inventionstatistics.com/Patent_Protection_Time_Periods.html
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The FDA blithely heaps additional testing demands not required by statute onto company's shoulders, so if it weren't for a good, long period of patent protection, drug research would grind to a halt. ... It's been extended periodically this last century, and now stands at about 100 years if the exentions are applied...
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www.samizdata.net/blog/archives/007795.html
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C471 Lecture; Updated: 24 October 2006 ... This lesson has been updated and transfered to Wiki format. See: ... 13. Chemical Patent Searching...
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www.indiana.edu/~cheminfo/C471/471cps.html
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How long does a patent last? The answer to that question depends on what you are patenting. ... How long does a patent last? Any inventor must know the answer to this question in order to protect his ideas and products. A patent is a condition granted by law to an inventor to prohibit others from “making, using,
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www.life123.com/career-money/business-law/patents/how-l...
www.life123.com/career-money/business-law/patents/how-long-does-a-patent-last.shtml
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For applications filed on or after June 8, 1995, utility and plant patents are granted for a term which begins with the date of the grant and usually ends 20 years from the date you first applied for the patent subject to the payment of app...
http://www.uspto.gov/main/faq/p120013.htm
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