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:
Aug. 07, 2001
Filed:
Jul. 07, 1999
Richard N. Coleman, Vegreville, CA;
Abstract
A hybrid filter system for degrading a sulfur-containing compound having a primary stage sacrificial filter and a secondary stage biofilter is disclosed. This hybrid filter system significantly increases the lifetime of the biofilter providing a cost effective and removal effective biofiltration filter system. The process consists of two filtration stages, a primary stage sacrificial filtration and a secondary stage biofiltration. A small percentage of the sulfur-containing compound is oxidized to elemental sulfur which blocks the pore space of the filter matrix. The primary stage sacrificial filter is used to trap and remove elemental sulfur which is produced when the sulfur-containing compound is passed through the filter. To protect the secondary stage biofilter from premature plugging by precipitated elemental sulfur the primary stage sacrificial filter is used to capture the precipitated elemental sulfur. It is then sacrificed on a regular basis to minimize the impact of the elemental sulfur on the secondary stage biofilter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile