US Patent Issued to DAIKIN INDUSTRIES on Nov. 25 for "Tube, method for producing tube, and method for storing tube" (Japanese Inventors)

ALEXANDRIA, Va., Nov. 25 -- United States Patent no. 12,480,605, issued on Nov. 25, was assigned to DAIKIN INDUSTRIES LTD. (Osaka, Japan).

"Tube, method for producing tube, and method for storing tube" was invented by Hitoshi Imamura (Osaka, Japan), Hiroyuki Hamada (Osaka, Japan), Eri Mukai (Osaka, Japan), Yuuki Kuwajima (Osaka, Japan) and Manabu Fujisawa (Osaka, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is a tube comprising a tetrafluoroethylene/fluoroalkyl vinyl ether copolymer, wherein the tube inner surface has a surface roughness Ra of 5 nm or less measured by atomic force microscopy (AFM) with an evaluation length set to 3 micro metre, and the tube has an amount of metals eluted fro...