Re: Expired patents

Dave Crocker <dhc@dcrocker.net> Fri, 20 June 2014 02:29 UTC

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Date: Thu, 19 Jun 2014 19:27:46 -0700
From: Dave Crocker <dhc@dcrocker.net>
Organization: Brandenburg InternetWorking
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To: Brian E Carpenter <brian.e.carpenter@gmail.com>, IPR WG <ipr-wg@ietf.org>
Subject: Re: Expired patents
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On 6/19/2014 6:24 PM, Brian E Carpenter wrote:
> I was wondering whether there is a need for an occasional sweep
> over the IPR disclosures to tag all those that cite expired
> patents. We've been at this long enough that it is starting to
> be relevant. For example, I just noticed that IBM's NAT patent
> (US5371852) must have expired by now. 


That is certainly a reasonable suggestion, but I suspect it can
sometimes carry unfortunate complexities.

For example imagine someone filing a continuing patent but not updating
the IETF's records. There would be relevant IPR encumbrance but we
wouldn't necessarily know it.

No matter what we do or don't do, the record won't be perfect, but we
probably should be cautious about having our records move from
'encumbered' to 'not encumbered' through any simple process such as a
timeout.

d/


-- 
Dave Crocker
Brandenburg InternetWorking
bbiw.net