US4849274A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Honeycomb fluid conduit
Assignee: BASF Catalysts LLC
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Filing: 1987-09-28
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Granted: 1989-07-18
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Expires: 2007-09-28
Abstract
Abstract There is provided an improved honeycomb type gas conduit characterized by alternating noncorrugated aluminized ferrous metal foil and corrugated metal foil sheets in contact with each other at the apices or crests of the corrugation. The conduit has an inlet and an outlet for the gas and the honeycomb structure from 20 to 200 cells per square inch. The axes of the cells are parallel throughout their length. A hardened ceramic lip is provided at the leading edge of the cells, and preferably at the leading and trailing edges. When hardened by curing, e.g., with high temperature, the ceramic applied as a slip, forms fillets at the nips between the corrugations and the flat foil sheets, and cements the two together very tightly.
Inventors
- 👤 Richard C. Cornelison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:32
CPC Classifications
F; F01; F01N; F01N3/00; F01N3/02; F01N3/021; F01N3/0218; F01N3/022; F01N3/0222; F01N3/033; F01N3/035; F01N3/08; F01N3/10; F01N3/24; F01N3/28; F01N3/2803; F01N3/2807; F01N3/281; F01N2330/00; F01N2330/02; F01N2510/00; F01N2510/06; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24149; Y10T428/24174; Y10T428/24182
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
98 words
An aluminized ferrous metal foil assembly of alternating noncorrugated aluminized ferrous metal foil and corrugated aluminized ferrous metal foil sheets in contact with each other at the apices of said corrugations, and defining a honeycomb gas passageway having an inlet and an outlet, said honeycomb having from 20-200 cells per square inch, the axes of said cells being parallel to each other throughout their length, and a hardened ceramic lip coating on at least one outer edge, and extending into the nips between the noncorrugated and corrugated ferrous metal sheets to cement the noncorrugated and corrugated strips together.
Claim 2
Dependent Claim
98 words
An aluminized ferrous metal foil assembly of alternating noncorrugated aluminized ferrous metal foil and corrugated aluminized ferrous metal foil sheets in contact with each other at the apices of said corrugations, and defining a honeycomb gas passageway having an inlet and an outlet, said honeycomb having from 20-200 cells per square inch, the axes of said cells being parallel to each other throughout their length, and a hardened ceramic lip coating on at least one outer edge, and extending into the nips between the noncorrugated and corrugated ferrous metal sheets to cement the noncorrugated and corrugated strips together.
Claim 3
Dependent Claim
17 words
An aluminized ferrous metal foil body as defined in claim 1 wherein the body is convolute wound.
Claim 4
Dependent Claim
27 words
An aluminized ferrous metal foil body as defined in claim 1 wherein the ceramic lip coating is formed from a slip containing gamma alumina and gel alumina.
Claim 5
Dependent Claim
27 words
An aluminized ferrous metal foil body as defined in claim 1 wherein the surfaces of the noncorrugated and corrugated foil members have a catalytically active surface thereon.
Claim 6
Dependent Claim
21 words
An aluminized ferrous metal foil body as defined in claim 1 wherein the ferretic foil is aluminized with vapor deposited aluminum.
Claim 7
Dependent Claim
24 words
An aluminized ferrous metal foil body as defined in claim 5 wherein the aluminized ferritic foil is provided with a calcined washcoat of alumina.
Claim 8
Dependent Claim
18 words
An aluminized ferrous metal foil body as defined in claim 6 wherein the alumina is a plasma coating.
Claim 9
Dependent Claim
22 words
An aluminized ferrous metal foil body as defined in claim 6 wherein the calcined washcoat has impregnated therein a catalytically active metal.
Claim 10
Dependent Claim
20 words
An aluminized ferrous metal foil body as defined in claim 8 wherein the catalytically active metal is a noble metal.
Claim 11
Dependent Claim
17 words
An aluminized ferrous metal foil body as defined in claim 9 wherein the noble metal is palladium.
Claim 12
Dependent Claim
21 words
An aluminized ferrous metal foil body as defined in claim 1 wherein the ferrous metal foil is a stainless steel foil.
Claim 13
Dependent Claim
22 words
An aluminized ferrous metal foil body as defined in claim 1 wherein the ferrous metal foil is a ferritic stainless steel foil.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-07-17 | 1993-01-16 | 1993-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-17 | 1997-01-16 | 1997-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-17 | 2001-01-16 | 2001-07-18 | $7700.00 | Window Closed / Lapsed |