ALEXANDRIA, Va., Feb. 25 -- Cabot, Boston, has been assigned a patent (9,574,087) developed by four co-inventors for a "method for carbon black production using preheated feedstock and apparatus for same." The co-inventors are Serguei Nester, Tyngsboro, Massachusetts, Frederick H. Rumpf, Billerica, Massachusetts, Yakov E. Kutsovsky, Arlington, Massachusetts, and Charles A. Natalie, Pampa, Texas.

The patent application was filed on Oct. 24, 2014 (14/522,605). The full-text of the p . . .