Expiry date of patents (l513ep)

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Posts: 1
Joined: Tue Feb 18, 2014 12:51 pm

Expiry date of patents (l513ep)

Post by svacina » Tue Feb 18, 2014 2:01 pm

do you think that PATSTAT offers correct expiry dates of patents? I filtered patents with expiry before 9999 and when I compared it with filling date, I got a lot of patents with legal life over 25 years, even over 50 years, e.g. patent with ID 50717985 = 70,2 years :roll:.
Does it make any sense to anyone?
Thanks for responses.

Posts: 140
Joined: Wed Jul 08, 2009 5:51 pm

Re: Expiry date of patents (l513ep)

Post by nico.rasters » Fri Feb 21, 2014 6:59 pm

I don't have access to TLS221_INPADOC_PRS, so I can not look into this myself.
But have you checked Espacenet? It has a INPADOC legal status link.
Just put http://worldwide.espacenet.com/ in front of the `appln_nr_epodoc` to go directly to the patent.
Btw, the patent you mentioned is a US patent? It had no legal information in Espacenet.

Maybe in some cases it's counted from the grant of the patent instead of the filing date?
"It is usually expressed in a number of years either starting from the filing date of the patent application or from the date of grant of the patent."
Nico Doranov
Data Manager

Daigu Academic Services & Data Stewardship

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