We pushed through a major coverage update tonight. The PatentFizz database now includes an expiration comment for every patent that has expired for failure to pay a maintenance fee since October 22, 1999. Check out the earliest expiration in our database for an example - US Patent No. 5,058,213 for a Raw Sewage Drying Apparatus.

Yum….public domain never smelled so good.

For those keeping track, we count 461,456 maintenance fee related expirations since that date.