Linked by jrincayc on Fri 15th Jul 2011 17:14 UTC
Legal Patent term calculation is complicated in the US because there are essentially two different systems and quite a few corner cases. Even with a list of patents, it can be tricky to determine when the patents are all expired. Since I am a computer programmer (and not a lawyer), I created a program to try and automate this. This paper discusses how patent term calculation works, and some results from a combination of hand and automatic term calculation for MP3, MPEG-2 and H.264.
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Confused
by ingraham on Fri 15th Jul 2011 22:10 UTC
ingraham
Member since:
2006-05-20

If the H.264 standard came out in 2003, how is it possible that a patent on it could last until 2027? At the latest, wouldn't it expire in 2023?

Edited 2011-07-15 22:10 UTC

Reply Score: 1

RE: Confused
by jrincayc on Fri 15th Jul 2011 22:37 in reply to "Confused"
jrincayc Member since:
2007-07-24

That is a good question, since it shouldn't happen that way. However, as I explained in the article, US 7826532, filed in 2003 has a 1546 day extension. I haven't checked how it managed to get an over 4 year extension.

http://patft1.uspto.gov/netacgi/nph-Parser?patentnumber=7826532
http://www.google.com/patents/about?id=2onYAAAAEBAJ

Reply Parent Score: 2