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:
Apr. 17, 2012
Filed:
Jul. 20, 2006
David A. Bell, Stafford, GB;
David L. Jones, Birmingham, GB;
Kassim Juma, Stafford, GB;
Helmut Jaunich, Raesfeld, DE;
Andreas Ansorge, Borken, DE;
Martin Schmidt, Duisburg, DE;
David A. Bell, Stafford, GB;
David L. Jones, Birmingham, GB;
Kassim Juma, Stafford, GB;
Helmut Jaunich, Raesfeld, DE;
Andreas Ansorge, Borken, DE;
Martin Schmidt, Duisburg, DE;
Foseco International Limited, Fazeley, Tamworth, Staffordshire, GB;
Abstract
A process for making a filter suitable for filtering molten metal comprising (i) forming a slurry comprising (a) particles of a refractory material, (b) a binder and (c) a liquid carrier, (ii) coating a disposable former with a slurry, (iii) drying the coated former, (iv) optionally applying one or more additional coats of a refractory material and/or a binder, optionally with liquid carrier, and drying the one or more additional coats, and (v) firing the coated former to produce the filter, wherein the binder is a carbon rich source selected from one or more of the following classes of materials: pitches, tars and organic polymers that degrade to form carbon on pyrolysis.