I just looked that number up and got
https://patents.google.com/patent/FR3025006A1/en
Which is a patent you tried to take out @PierreB
with drawings like this
They are very specific about dates being important
2014-08-22 Application filed by Pierre Benhaiem
2014-08-22Priority to FR1401892A
2016-02-26Publication of FR3025006A1
2019-09-23Application status is Withdrawn
It’s weirdly reminiscent of this set I drew and shared with you a couple of years prior
arches and spinning sets 52 views •Published on 27 Nov 2012
This is probably a better link to @dougselsam’s superturbine patent instead
https://patents.google.com/patent/US6616402
Doug highlights the advantages of high rotary speed for motor generation and has a brilliant set of designs… As such, Doug prefers to keep rotor surfaces close to the axis. I’ve been trying to do away with a physical component to the axis, focussing more on wider sweep radius.