ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,523,661, issued on Jan. 13, was assigned to JANSSEN BIOTECH INC. (Horsham, Pa.).

"Materials and methods for differential characterization of molecular conjugates and conjugation" was invented by Harsha Gunawardena (Lafayette Hill, Pa.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods of analyzing a drug polypeptide conjugate using tandem mass spectrometry involving dual tandem mass tags (TMTs) are described. Provided herein is an integrated method using TMTs to obtain three analytical measurements, termed "triple play", which enables identification of the drug occupancy, normalization between multiple samples and triggering of additional MS/MS to i...