US4181758A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for preventing the deposition of a coating on a substrate
Assignee: KLOCK OF DELAWARE Inc
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Filing: 1978-02-06
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Granted: 1980-01-01
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Expires: 1998-02-06
Abstract
Abstract A method of preventing the deposition of an aluminum-based pack coating on a predetermined portion of a substrate is provided, said method including the principal step of applying a maskant composition to said predetermined portion prior to coating. The composition includes a reduceable metal oxide capable of reacting with and being reduced by said coating; an inhibitor for controlling the rate of reaction between the coating and the reduceable material; and a resinous binder vehicle in which the reduceable material and the inhibitor are suspended.
Inventors
- 👤 Richard C. Elam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:42
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/12; F01D5/28; F01D5/288; C; C23; C23C; C23C10/00; C23C10/04; C23C14/00; C23C14/04; C23C14/042; C23C4/00; C23C4/01
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
196 words
A method for preventing the deposition of an aluminum-based pack coating on a pre-determined portion of a substrate, said method comprising the steps of: preparing a maskant composition having: a solids portion including: a reducable material in an amount in excess of about 8% by weight of said solids portion and being capable or reacting with and being reduced by said coating, said reduceable material being selected from the group consisting of zirconium oxide, ferric oxide, titanium dioxide, titanium sesquioxide and nickelous oxide; and an inhibitor in an amount sufficient to control the rate of reaction between the reduceable material and the coating, thereby preventing excessive volumetric change of the maskant, said inhibitor being selected from the group consisting of tungsten, molybdenum, tantalum, cobalt, chromium, iron and nickel and wherein said amount comprises an amount up to about 92% by weight of said solids portion; and a binder vehicle, including a resinous material and a solvent in which the solids portion is suspended; applying said maskant composition to the pre-determined portion of said substrate and allowing said maskant composition to dry; applying said pack coating to said substrate; and removing said maskant composition from said substrate.
Claim 2
Independent Claim
196 words
A method for preventing the deposition of an aluminum-based pack coating on a pre-determined portion of a substrate, said method comprising the steps of: preparing a maskant composition having: a solids portion including: a reducable material in an amount in excess of about 8% by weight of said solids portion and being capable or reacting with and being reduced by said coating, said reduceable material being selected from the group consisting of zirconium oxide, ferric oxide, titanium dioxide, titanium sesquioxide and nickelous oxide; and an inhibitor in an amount sufficient to control the rate of reaction between the reduceable material and the coating, thereby preventing excessive volumetric change of the maskant, said inhibitor being selected from the group consisting of tungsten, molybdenum, tantalum, cobalt, chromium, iron and nickel and wherein said amount comprises an amount up to about 92% by weight of said solids portion; and a binder vehicle, including a resinous material and a solvent in which the solids portion is suspended; applying said maskant composition to the pre-determined portion of said substrate and allowing said maskant composition to dry; applying said pack coating to said substrate; and removing said maskant composition from said substrate.
Claim 3
Dependent Claim
23 words
The method of claim 1 wherein said substrate is selected from the group consisting of nickel based, iron based and cobalt based substrates.
Claim 4
Dependent Claim
12 words
The method of claim 1 wherein said reduceable material is titanium dioxide.
Claim 5
Dependent Claim
25 words
The method of claim 1 wherein said inhibitor is nickel in an amount between about 5% to about 15% by weight of said solids portion.
Claim 6
Dependent Claim
47 words
The method of claim 1 wherein said solids portion further includes an inert material in an amount up to about 95% by weight of said solids portion, said inert material selected from the group consisting of the oxides of scrandium, yttrium, lanthanum, hafnium, thorium, tantalum and aluminum.
Claim 7
Dependent Claim
19 words
The method of claim 1 wherein said maskant is applied to the substrate by the use of a spatula.
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein said dried maskant composition is removed by fracturing said composition.
Claim 9
Dependent Claim
45 words
The method of claim 1 wherein said binder vehicle includes a resinous material selected from the group consisting of cellulose based organics, gum arabic and acrylic resins and wherein said solvent is selected from the group consisting of alcohol, acetone, toluene, methyl-ethyl-ketone, trichlorethylene and water.
Claim 10
Dependent Claim
21 words
The method of claim 8 wherein said binder vehicle comprises a mixture, in even proportions, of methyl-ethyl-ketone and an acrylic resin.
Claim 11
Independent Claim
154 words
A method for preventing the deposition of an aluminum based pack coating on a nickel based substrate, said method comprising the steps of: providing a maskant composition by: blending together a solids portion including between about 8% and about 12% by weight of titanium dioxide, between about 75% and about 85% by weight of aluminum oxide and between about 8% and about 12% by weight of nickel; adding said solids portion in a volumetric ratio of two parts solid to one part vehicle to a vehicle composed of 50% by volume of methyl-ethyl-ketone and 50% by volume of an acrylic resin; applying said maskant composition to a pre-determined portion of said substrate and allowing said composition to dry; applying an aluminum based pack coating on said substrate for a time sufficient to permit the unmasked portion of said substrate to react and thereby be coated with said pack coating; and removing said maskant composition.
Claim 12
Independent Claim
154 words
A method for preventing the deposition of an aluminum based pack coating on a nickel based substrate, said method comprising the steps of: providing a maskant composition by: blending together a solids portion including between about 8% and about 12% by weight of titanium dioxide, between about 75% and about 85% by weight of aluminum oxide and between about 8% and about 12% by weight of nickel; adding said solids portion in a volumetric ratio of two parts solid to one part vehicle to a vehicle composed of 50% by volume of methyl-ethyl-ketone and 50% by volume of an acrylic resin; applying said maskant composition to a pre-determined portion of said substrate and allowing said composition to dry; applying an aluminum based pack coating on said substrate for a time sufficient to permit the unmasked portion of said substrate to react and thereby be coated with said pack coating; and removing said maskant composition.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-12-31 | 1983-07-02 | 1984-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-12-31 | 1987-07-02 | 1988-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-12-31 | 1991-07-02 | 1992-01-01 | $7700.00 | Window Closed / Lapsed |