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The short answer is that it is expired for failure to pay a maintenance fee. The long answer is that Google makes a estimated expiration (their Adjusted expiration) when an application grants to a Patent. This patent grant issued in 2010 (and that's when the Adjusted expiration would have been auto-generated) but then the Applicant did not pay the 7.5 year ...


1

To get to the bottom of almost any issue with a U.S. patent go to Public PAIR. The site is fussy about the format of the application number or publication number you enter. I see the expiration due to fee nonpayment but I do not see any petition to revive so I would guess that the info panel at google patents is garbled. Transaction History Date ...


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