Resources Contact Us Home
Sterilization of cryogenic liquids by ultrafiltration

Image Number 3 for United States Patent #4759848.

A cryogenic liquid is sterilized by passing it through a microporous filter, while subcooling the liquid. Subcooling virtually eliminates the possiblity of formation of gas bubbles in the liquid, and thereby insures that the desired mass flow of liquid, through the filter, will be maintained. The apparatus used with this invention comprises an insulated tank, filled with cryogenic liquid. A container having a microporous filter disposed therein, is submerged within the tank. The filter can be made of nylon mesh, which is encased within a polypropylene frame. The filter has a pore size of about 0.2 microns or less. The liquid to be sterilized is a saturated cryogenic liquid. The liquid in the tank is held at a temperature lower than that of the liquid to be sterilized, and therefore subcools the liquid being sterilized. The sterilized liquid is then withdrawn directly from the filter container.

  Recently Added Patents
Method for forming a film
Power supply system for a data storage system and a method of controlling a power supply
Scanning projection apparatus with tangential compensation
System and method for a driver circuit with a referenced control signal
Method and apparatus for reacquiring lines in a cache
Tetrazolyl oxime derivative, salt thereof, and plant disease control agent
  Randomly Featured Patents
Agricultural machine for crop interseeding
Profiled section for door-leaves
Image pickup apparatus and method, signal processing apparatus and method, and wearable signal processing apparatus
Acting valve gear
Polymer compositions containing sulfate glasses or glass-ceramics
Method for sewing together a tubular workpiece and a pocket-shaped workpiece and automatic sewing device for carrying out the method
Illuminator for use with a remote light source
Polyphase rotating machine equipped with an improved control device
Airfoil blade with cushioned edge for powered toy aircraft
Methods of treating keratin based substrates