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Old 06-15-2003, 09:06 AM   #1 (permalink)
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How does a patent work?

Once you patent something, no one else can produce that product for how long? i think its 20 years. am i right?

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Old 06-15-2003, 09:44 AM   #2 (permalink)
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i thought 30 years but 20 sounds also good

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Old 06-15-2003, 10:27 AM   #3 (permalink)
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Quote:
As noted above and reported elsewhere in these pages, the lifetime of a U.S. Patent is now twenty years from its effective filing date.[1] For foreigners that might well be 21 years from the filing date in their home country patent application if they wait until the end of the one year time period for filing an application in the United States claiming priority to their home country application under the Paris Convention. In order to give U.S. applicants basically the same privilege, the provisional patent application was created.
http://www.ladas.com/Patents/ProvisionalPatentApps.html
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Old 06-15-2003, 11:07 AM   #4 (permalink)
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patent law: an overview - Cornell.edu
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Old 06-15-2003, 08:33 PM   #5 (permalink)
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http://www.uspto.gov
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