MANUFACTURING METHOD AND STRUCTURE OF CELL CRYOPRESERVATION TUBE
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United States of America Patent
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Issued Date -
Nov 10, 2011
app pub date -
May 4, 2010
filing date -
May 4, 2010
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Abandoned
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Abstract
Manufacturing method of cell cryopreservation tube comprises the steps of providing a metal tubule having an inside wall and an outside wall. Smoothing the inside wall of the metal tubule thereby forming a smooth surface on the inside wall, and the roughness of the smooth surface is named the first roughness. Roughening the outside wall of the metal tubule thereby forming a rough surface on the outside wall, and the roughness of the rough surface is called the second roughness. The magnitude of the second roughness is greater than the first roughness.
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