[Milsurplus] Speaking of Rejuvenating tubes

[John Hutchins]

All -

Any one have knowledge if this procedure to Rejuvenate tubes?
http://www.wipo.int/pctdb/en/wo.jsp?WO=2007073517&IA=WO2007073517&DISPLAY=CLAIMS


Sounds similar to Rejuvenate tubes article:
http://www.antiquewireless.org/otb/rejuve.htm

I wonder if a combination of methods would work;  over heating by 135% 
of rated voltage and  Pulsing with a low voltage to cause the filament 
to shake.

1. how much voltage potential would be acceptable between the filament 
and cathode since they are not physically connected.
2  what would be the frequency required to get the cathode and filament 
physically to shake a minute amount.
3. Reversing the voltage on the cathode put a positive on the cathode, 
Negative on one side of the filament, and plate would this help drive 
off impurities from the cathode.

Hutch