US Patent Issued to Walter on Oct. 6 for "Coated cutting tool with an alternating layer composition" (German Inventors)

ALEXANDRIA, Va., Oct. 6 -- United States Patent no. 12,752,344, issued on Oct. 6, was assigned to Walter AG (Tubingen, Germany).

"Coated cutting tool with an alternating layer composition" was invented by Veit Schier (Tubingen, Germany) and Wolfgang Engelhart (Tubingen, Germany).

According to the abstract* released by the U.S. Patent & Trademark Office: "A coated cutting tool includes a substrate and a coating. The coating has a (Ti,Al,Si)N layer, which has a periodical change in contents of the elements Ti, Al, and Si, over the thickness of the (Ti,Al,Si)N layer, between a minimum content and a maximum content of each element. The average minimum content of Ti is from 14 to 18 at. % and the average maximum content of Ti is from 18 to 22 ...