The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 14, 1992
Filed:
Oct. 29, 1990
David J Nell, Oradell, NJ (US);
Gordon W Czop, Garfield, NJ (US);
Wayne G Schuliger, Coraopolis, PA (US);
Marquess and Nell, Inc., New York, NY (US);
Abstract
A method of oxidizing feed materials using a multiple hearth furnace comprises the steps of introducing the feed materials to be oxidized on at least the uppermost hearth, introducing fuel/air mixtures in the uppermost hearth to dry and ignite the feed materials, introducing air on at least one hearth to support combustion of the feed materials, allowing the feed materials to move downwardly from hearth to hearth and thereafter to exit the bottom of the furnace, and causing the combustion products formed by oxidation of the fuel and feed materials to be drawn down through the furnace and exhausted from a lower hearth.