US Patent Issued to FUJIFILM on May 20 for "Magnetic tape having characterized magnetic layer surface, magnetic tape cartridge, and magnetic tape device" (Japanese Inventor)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,057, issued on May 20, was assigned to FUJIFILM Corp. (Tokyo).

"Magnetic tape having characterized magnetic layer surface, magnetic tape cartridge, and magnetic tape device" was invented by Norihito Kasada (Minamiashigara, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetic tape in which a C-H derived C concentration calculated from a C-H peak surface area ratio in C1s spectra obtained by X-ray photoelectron spectroscopy performed on a surface of the magnetic layer at a photoelectron take-off angle of 10 degrees is 45 atom % to 65 atom %, and in an environment with a temperature of 32deg C. and a relative humidity of 80%, a frictional fo...