ALEXANDRIA, Va., Feb. 11 -- United States Patent no. 12,543,775, issued on Feb. 10, was assigned to Philip Morris Products S.A. (Neuchatel, Switzerland).

"Methods for reducing one or more tobacco specific nitrosamines in tobacco material" was invented by Gerhard Lang (Murten, Switzerland), Irfan Gunduz (Le Mont-sur-Lausanne, Switzerland) and Aline Vuarnoz-Bize (Onens, Switzerland).

According to the abstract* released by the U.S. Patent & Trademark Office: "There is described herein a method of reducing the amount of at least matrix-bound NNK in tobacco material comprising the steps of: (a) providing tobacco material comprising at least matrix-bound NNK; (b) optionally measuring the level of at least matrix-bound NNK in the tobacco materia...