Patent US4664969A successfully refreshed from Google Patents.
US4664969A
Expired / Lapsed
US
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Method for spray applying a refractory layer on a surface and the layer produced thereby
Assignee: Johns Manville Corp
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Filing: 1986-05-30
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Granted: 1987-05-12
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Expires: 2006-05-30
Abstract
Abstract A method for spray applying refractory fiber to a surface. An alumina containing binder, preferably aluminum chloride, is used in a spray method to bond the fiber to itself and to a substrate surface. A refractory layer comprised of fiber and binder produced by the method of the invention is also disclosed.
Inventors
- 👤 Nicholas J. Rossi
- 👤 Edward B. Gaburo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:07
CPC Classifications
B; B05; B05D; B05D1/00; B05D1/02; B05D1/12; F; F27; F27D; F27D1/00; F27D1/16; F27D1/1636; C; C04; C04B; C04B30/00; C04B30/02; F27D1/0003; F27D1/0006; F27D1/0009; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249924; Y10T428/249928
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
83 words
Method for producing a refractory layer on a substrate comprising the steps of: directing a stream of refractory fibers toward said substrate; spraying a liquid binder into said stream during said step of directing so as to substantially coat said fibers with said binder, said binder capable of forming alpha alumina (Corundum) crystals upon curing; and curing said coated fibers on said substrate so as to produce an alpha alumina (Corundum) crystal bond between at least some of said fibers and said substrate.
Claim 2
Dependent Claim
83 words
Method for producing a refractory layer on a substrate comprising the steps of: directing a stream of refractory fibers toward said substrate; spraying a liquid binder into said stream during said step of directing so as to substantially coat said fibers with said binder, said binder capable of forming alpha alumina (Corundum) crystals upon curing; and curing said coated fibers on said substrate so as to produce an alpha alumina (Corundum) crystal bond between at least some of said fibers and said substrate.
Claim 3
Dependent Claim
13 words
Method according to claim 1 wherein said binder includes an aluminum chloride solution.
Claim 4
Dependent Claim
27 words
Method according to claim 1 further including the step of, prior to said step of directing said fibers, coating said surface to be sprayed with said binder.
Claim 5
Dependent Claim
29 words
Method according to claim 2 wherein said aluminum chloride binder is diluted with water in an approximate dilution ratio by volume of two parts binder to one part water.
Claim 6
Dependent Claim
24 words
Method according to claim 3 wherein said binder is diluted in a ratio of approximately two parts by volume binder to one part water.
Claim 7
Dependent Claim
23 words
Method according to claim 2 wherein said binder includes approximately up to four parts by volume water to one part aluminum chloride solution.
Claim 8
Dependent Claim
21 words
Method according to claim 1 wherein the ratio of fiber to binder is approximately one pound fiber to one pound binder.
Claim 9
Dependent Claim
27 words
Method according to claim 1 further including, after said step of spraying, the step of applying a sprayed layer of fibers using a binder including aluminum phosphate.
Claim 10
Dependent Claim
26 words
Method according to claim 1 further including, after said step of spraying, the step of applying a coating of said liquid binder onto said refractory layer.
Claim 11
Dependent Claim
37 words
Method according to claim 2 wherein said undiluted aluminum chloride binder includes, in approximate weight percent: ______________________________________
Al.sub.2 O.sub.3
63.0% CaO + MgO 0.02%
SiO.sub.2
0.02% Na.sub.2 O 0.25%
Fe.sub.2 O.sub.3
0.02% Chloride 6.2%
Water 30.5%
______________________________________
Claim 12
Dependent Claim
27 words
Method according to claim 1 further including, after said step of spraying, the step of applying a sprayed layer of fibers using a binder including colloidal silica.
Claim 13
Dependent Claim
27 words
Method according to claim 1 further including, after said step of spraying, the step of applying a sprayed layer of fibers using a binder including colloidal alumina.
Claim 14
Dependent Claim
19 words
Method according to claim 1 wherein the density of said refractory layer is up to 40 lb/ft 3 .
Claim 15
Dependent Claim
25 words
Method according to claim 1 wherein said step of curing includes exposing said refractory layers to a mean temperature of at least approximately 700° F.
Claim 16
Dependent Claim
25 words
Method according to claim 1 wherein said step of curing includes exposing said refractory layer to a mean temperature of at least approximately 230° F.
Claim 17
Dependent Claim
21 words
An article comprising a refractory layer bonded to a substrate according to the method of claims 1, 2, 10 or 13.
References Cited (Backward Citations)
US1718507A
Cited
US2433463A
Cited
US2604416A
Cited
US2850421A
Cited
US2842897A
Cited
US3107057A
Cited
US2929436A
Cited
US3171874A
Cited
GB1142201A
Cited
DE1458912A1
Cited
GB1182241A
Cited
US3959063A
Cited
JPS4987723A
Cited
JPS5140846A
Cited
US4272935A
Cited
GB2093015A
Cited
US4375493A
Cited
US4492766A
Cited
US4547403A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |