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:
Mar. 07, 2000
Filed:
Mar. 18, 1998
Mark J Friederick, Dubuque, IA (US);
Steven C Peake, Dubuque, IA (US);
Barnstead/Thermolyne Corporation, Dubuque, IA (US);
Abstract
A furnace includes an enclosure and a hearth plate within the enclosure for supporting combustible material. The furnace further includes a first heater element adjacent the hearth plate for initial combustion of the combustible material, a filter disposed above the hearth plate for filtering uncombusted products of combustion of the combustible material, and a second heater element adjacent the filter for final combustion of the uncombusted products of combustion filtered by the filter. A filter bypass path has an inlet located in a lower portion of the enclosure and an outlet located between the filter and the second heater.