US5194154A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Structure for filter or heat exchanger, composed of a fused single crystal acicular ceramic
Assignee: Dow Chemical Co
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Filing: 1991-12-05
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Granted: 1993-03-16
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Expires: 2011-12-05
Abstract
Abstract A cross-flow structure useful for filtering a fluid, for exchanging one or more constituents between two fluids, or for exchanging heat between two fluids, includes a body having porous partition walls defining at least one open channel extending entirely through it, and a portion of collecting fluid exiting the body through the porous partition walls, rather than through the open channel(s). The body is composed of a fused, interlocked, single crystal acicular ceramic material, preferably a non-stoichiometric acicular mullite of about 76 percent by weight Al 2 O 3 and about 24 percent by weight SiO 2 . The portion for collecting fluid exiting from the porous walls is preferably an impermeable coating, such as a glaze, substantially covering the exterior of the body, except for the areas where fluid enters the open channel(s) and exits the porous walls.
Inventors
- 👤 John R. Moyer
- 👤 Neal N. Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 06:26
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/24; B01D46/2403; B01D46/2418; B01D29/00; B01D29/11; B01D29/31; B01D29/35; B01D29/356; B01D29/50; B01D29/52; B01D39/00; B01D39/14; B01D39/20; B01D39/2068; B01D39/2072; B01D39/2075; B01D46/0039; B01D46/2451; B01D46/2455; B01D46/2474; B01D63/00; B01D63/06; B01D63/066; B01D69/00; B01D69/10; B01D69/108; B01D71/00; B01D71/02; B01D71/0213; C; C04; C04B; C04B35/00; C04B35/01; C04B35/16; C04B35/18; C04B35/185; C04B38/00; C04B38/0006; F; F28; F28F; F28F21/00; F28F21/04; B01D2201/00; B01D2201/46; B01D2239/00; B01D2239/04; B01D2239/0471; B01D2239/0478; C04B2111/00; C04B2111/00474; C04B2111/00793; C04B2111/00801; Y; Y10; Y10S; Y10S55/00; Y10S55/10; Y10S55/30
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
61 words
A structure for filtering a fluid or for exchanging a constituent between two fluids, comprising means for providing cross-flow including: a body composed of a fused, interlocked, single crystal acicular ceramic material, said body having porous partition walls defining at least one open channel extending entirely through said body; and means for collecting fluid exiting said body through said partition walls.
Claim 2
Dependent Claim
61 words
A structure for filtering a fluid or for exchanging a constituent between two fluids, comprising means for providing cross-flow including: a body composed of a fused, interlocked, single crystal acicular ceramic material, said body having porous partition walls defining at least one open channel extending entirely through said body; and means for collecting fluid exiting said body through said partition walls.
Claim 3
Dependent Claim
23 words
The structure of claim 1, wherein said means for collecting exiting fluid includes an impermeable coating substantially covering the exterior of said body.
Claim 4
Dependent Claim
11 words
The structure of claim 2, wherein said coating is a glaze.
Claim 5
Dependent Claim
22 words
The structure of claim further comprising a membrane disposed on said porous partition walls, thereby lining said at least one open channel.
Claim 6
Dependent Claim
13 words
The structure of claim 4, wherein said membrane is a porous discriminating layer.
Claim 7
Dependent Claim
34 words
The structure of claim 5, wherein said discriminating layer is a sintered ceramic layer, a layer of a polymeric organic compound, a molecular sieve, a gel filtration layer, or a microporous gaseous diffusion barrier.
Claim 8
Dependent Claim
14 words
The structure of claim 5, wherein said discriminating layer is a sintered alpha-alumina membrane.
Claim 9
Dependent Claim
23 words
The structure of claim wherein said body includes a honeycomb extrusion having a plurality of parallel open channels defined by said partition walls.
Claim 10
Dependent Claim
18 words
The structure of claim 8, wherein all of said plurality of parallel channels fluidly communicate with one another.
Claim 11
Dependent Claim
44 words
The structure of claim 1, wherein said body includes a pair of porous end caps, composed of said acicular ceramic material and abutting said partition walls, each of said end caps having a hole therethrough in fluid communication with said at least one channel.
Claim 12
Dependent Claim
15 words
The structure of claim 10, wherein said end caps are interlocked with said partition walls.
Claim 13
Dependent Claim
20 words
The structure of claim 10, further comprising a pair of connecting tubes received in said holes in said end caps.
Claim 14
Dependent Claim
43 words
The structure of claim 10, wherein said end caps each include a recess opposite said partition walls extending only partway through said end caps, and wherein said structure further comprises a pair of connecting tubes received in said recesses in said end caps.
Claim 15
Dependent Claim
13 words
The structure of claim 1, wherein said ceramic material is non-stoichiometric acicular mullite.
Claim 16
Dependent Claim
18 words
The structure of claim 1, wherein said means for collecting exiting fluid is formed integrally with said body.
References Cited (Backward Citations)
US4041592A
Cited
EP0042301A1
Cited
US4364760A
Cited
US4559193A
Cited
US4818317A
Cited
US4894160A
Cited
US4846906A
Cited
US4910172A
Cited
US5098455A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-03-15 | 1996-09-14 | 1997-03-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-03-15 | 2000-09-14 | 2001-03-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-03-15 | 2004-09-14 | 2005-03-16 | $7700.00 | Window Closed / Lapsed |