US Patent Issued to 4C Air on Sept. 9 for "Biodegradable air filtering film and method for manufacturing same" (California Inventors)

ALEXANDRIA, Va., Sept. 10 -- United States Patent no. 12,410,315, issued on Sept. 9, was assigned to 4C Air Inc. (Sunnyvale, Calif.).

"Biodegradable air filtering film and method for manufacturing same" was invented by Mervin Zhao (Sunnyvale, Calif.) and Wang Xiao (Sunnyvale, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A filtering film includes a porous substrate and a membrane disposed on the porous substrate. The membrane includes a plurality of fibers of one or more bio-degradable materials. The fibers have an average diameter of about 50 nm to about 3 micro metre. The one or more bio-degradable materials has a melt flow index of at least 5 g/10 min at 210deg C. at a load of 2.16 kg."

The paten...