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US 4,067,965 AGranted
Thermal convection counter streaming sedimentation method for controlling the sex of mammalian offspring
OwnerBhairab C. Bhattacharyainventor
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OwnerBhairab C. Bhattacharyainventor
Estimating the term…
A method and apparatus for controlling the sex of mammalian offspring through separation of X-chromosome female producing sperm and Y-chromosome male producing sperm. The separation is accomplished by producing a thermal convection counter stream within a sedimentation column containing a universal medium with sperm suspended therein, and subsequently allowing the two sperm populations to sediment into different fractions according to different densities. The positive and negative geotaxis thus applied to the sperm facilitate a more efficient separation than has been previously obtained. The apparatus used to accomplish this separation includes means for producing a temperature differential between axial and peripheral portions of the medium contained in the sedimentation column thus creating the necessary thermal convection counter stream, and may also comprise a laser capable of scanning the length of the column and laser detecting means to determine the distribution of sperm produced within the medium.
A method of controlling the sex of mammalian offspring comprising the steps of:
A method of separating sperm cells of differing densities from semen comprising the steps of:
A method of separating mammalian sperm according to phenotypical differences related to normal and abnormal genotypes comprising the steps of:
A method of separating sperm cells of differing densities from semen comprising the steps of:
Dependencies are inferred from the claim text.