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A visit from the trollsA visit from the trollsPosted Oct 15, 2007 17:28 UTC (Mon) by JoeBuck (subscriber, #2330)In reply to: A visit from the trolls by withaar Parent article: A visit from the trolls According to freepatentsonline.com, US patents filed before June 1995 expire either 20 years from date of filing, or 17 years from date of issue, whichever is later. So the 5,072,412 expires in December 2008. After June 1995, US patents expire 20 years from date of filing, period.
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Patent expiry Posted Oct 15, 2007 18:14 UTC (Mon) by AJWM (guest, #15888) [Link] Note that the other two patents are extensions (or whatever the appropriate legal term is) of the '412 patent, and as such expire at the same time the '412 patent expires (Dec. '08). (This is noted on the patents themselves.)
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