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 The sterilized liquid is then withdrawn directly from the filter container.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
Storage system comprising multiple microprocessors and method for sharing processing in this storage system
Nucleic acids for cloning and expressing multiprotein complexes
Actuator, actuator structure and method of manufacturing actuator
Light-emitting device
System and method for ranking content and applications through human assistance
Architectural panel with millet and grass
Image forming apparatus assembled with a fixing member and a pressing member
  Randomly Featured Patents
Level detection by voltage addition/subtraction
Method of manufacturing an improved multi-grade lubricating grease
Graphical user interface for a display screen
Machinery for filling cavities with flowable reaction mixtures
Method and handheld electronic device including first input component and second touch sensitive input component
Edible shell for holding of comestible products
Lead conditioning system
Shaving blade for chip site dressing
Recombinant Zymomonas for pentose fermentation
Staple gun