Shell molds and cores from precoated fluid coke

Claim 1

A METHOD OF MAKING A SHELL MOLD, WHICH COMPRISES FORMING A LOOSE MIXTURE OF A MAJOR PROPORTION OF FLUID COKE AND A THERMAL SETTING RESIN BINDER DISTENDING ON SUCH FLUID COKE, SAID FLUID COKE HAVING BEEN PRODUCED BY CONTACTING A HEAVY PETROLEUM OIL COKING CHARGE STOCK AT A COKING TEMPERATURE WITH A BODY OF FLUIDIZED COKE PARTICLES IN A REACTION ZONE WHEREIN THE OIL IS CONVERTED TO PRODUCT VAPORS AND CARBONACEOUS SOLIDS ARE CONTINUOUSLY DEPOSITED ON THE COKE PARTICLES, REMOVING PRODUCT VAPORS FROM THE COKING ZONE, HEATING A PORTION OF THE COKE FROM THE COKING ZONE IN A HEATING ZONE TO INCREASE THE TEMPERATURE OF SAID FLUIDIZED PARTICLES, RETURNING A PORTION OF THE HEATED COKE PARTICLES FROM THE HEATING ZONE TO THE COKING ZONE AND WITHDRAWING COKE PRODUCT PARTICLES, PLACING SAID MIXTURE ON A HEATED PATTERN, FORMING THEREBY A THIN HARDENED LAYER OF SAID COMPOSITION IN THE FORM OF SAID PATTERN, AND RECOVERING FROM SAID PATTERN A SHELL MOLD.