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From: "John D'Errico" <woodchips@rochester.rr.com>
Newsgroups: comp.soft-sys.matlab
Subject: Re: Plotting 3-D Surface & Surface Fitting
Date: Wed, 5 Dec 2007 18:35:30 +0000 (UTC)
Organization: John D'Errico (1-3LEW5R)
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roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in message 
<fj6ppo$fol$1@canopus.cc.umanitoba.ca>...
> In article <fj5gi0$37r$1@fred.mathworks.com>,
> Bruno Luong <brunoluong@yahoo.com> wrote:
> >"John D'Errico" <woodchips@rochester.rr.com> wrote in
> >message <fj4ljd$n3g$1@fred.mathworks.com>...
> >
> >> 
> >> Not available in the public domain. It gets tricky,
> >> since gridfit is a variation of a tool that I developed
> >> almost 20 years ago. At the time, Kodak had me
> >> gain several US patents on the methods used,
> 
> >I believe patents expire in about 15/20 years depending on
> >the country.

I think it is 17 years in the US.

 
> Some countries (including the USA) sometimes allow patents to be renewed
> one or more times (not necessarily for as long each time.)

Yes. I've wondered whether Kodak will choose
to do so here. Only they know. I will check in a
year or so.

John