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:
Sep. 26, 1978
Filed:
Jan. 13, 1978
Applicant:
Inventor:
Brian Arthur Head, Maidstone, GB;
Assignee:
Whatman Reeve Angel Limited, Maidstone, GB;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
D21F / ;
U.S. Cl.
CPC ...
162152 ; 1621 / ; 162221 ; 162222 ; 162228 ; 210509 ; 264119 ;
Abstract
A porous tubular element of uniform density and porosity is formed by uniformly depositing binder and crushable fibers selected from the group consisting essentially of polycrystalline, alumina, zirconia, aluminum silicate and potassium polytitanate fibers from an aqueous dispersion onto a cylindrical mold. The tubular element is then compressed with sufficient pressure to crush and rearrange the fibers to obtain uniform density and porosity.