How long are US patents valid? 2 Answers as of September 24, 2010

How long from the date of filing are patents in the United States valid for?

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Mark S. Hubert PC
Mark S. Hubert PC | Mark Hubert
20 years from date of filing for a utility patent. 14 years from date of filing for a design patent.
Answer Applies to: Oregon
Replied: 9/24/2010
Kafantaris Law Group
Kafantaris Law Group | Theo Kafantaris
A utility patent can last 20 years and a design patent can last 14 years.
Answer Applies to: California
Replied: 9/24/2010
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