Claims
- 1. An element for filtering solid particulates from a diesel exhaust gas, comprising a shaped porous refractory ceramic body having a predominantly open pore structure and having distinct inlet and outlet surfaces, and where one of said surfaces contains an integral thin porous ceramic membrane layer of open cell porosity, the pores of which have an average diameter smaller than that of the pores at the other surface and the pores throughout the interior of the body, and wherein said porous refractory ceramic body is comprised of a fired porous aluminosilicate hydrogel-bonded ceramic composition.
Parent Case Info
This is a divisional of copending application Ser. No. 7/127,784 filed on Dec. 2, 1987, now U.S. Pat. No. 4,871,495.
US Referenced Citations (13)
Foreign Referenced Citations (4)
Number |
Date |
Country |
57-184410 |
Nov 1982 |
JPX |
57-184422 |
Nov 1982 |
JPX |
58-159828 |
Sep 1983 |
JPX |
62-234519 |
Oct 1987 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
127784 |
Dec 1987 |
|