Patent US4426250A successfully refreshed from Google Patents.
US4426250A
Expired / Lapsed
US
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Stripper system for surfaces
Assignee: COATING REMOVAL TECHNOLOGY Ltd
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Filing: 1981-10-15
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Granted: 1984-01-17
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Expires: 2001-10-15
Abstract
Abstract A stripper system comprises: a stripper composition for treating a surface so as to give removable treatment product for stripping at least a portion of said surface, said composition comprising at least one component chosen from: alkali metal oxides, alkali metal hydroxides, alkali metal carbonates, alkali earth metal oxides, alkali earth metal hydroxides, and alkali earth metal carbonates; and cover means for covering said composition at least a portion of time said composition treats said surface, said cover means being adapted to remove at least a portion of said treatment product when said cover means is moved in at least one direction appropriate for that removal. Preferably, the stripper composition includes sodium hydroxide and calcium hydroxide. Preferably, the cover means is an endless fibre fabric comprising polypropylene fibre and having a pile. The stripper system can be embodied for different applications, e.g. for stripping coatings of cured paint and/or of cured varnish.
Inventors
- 👤 Michael I. D. Brailsford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:41
CPC Classifications
C; C09; C09D; C09D9/00
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
83 words
A peel-away system for decomposing and stripping away a cured surface coating of paint or varnish from a surface, said system including a stripper composition for decomposing said coating and cover means adapted to cover said stripper composition and said surface coating and further adapted to lift a portion of the decomposed surface coating from said surface when said cover means is peeled away from said surface, wherein said cover means includes pile means to which said decomposed surface coating may be attached.
Claim 2
Dependent Claim
83 words
A peel-away system for decomposing and stripping away a cured surface coating of paint or varnish from a surface, said system including a stripper composition for decomposing said coating and cover means adapted to cover said stripper composition and said surface coating and further adapted to lift a portion of the decomposed surface coating from said surface when said cover means is peeled away from said surface, wherein said cover means includes pile means to which said decomposed surface coating may be attached.
Claim 3
Dependent Claim
43 words
The system of claim 1 wherein said stripper composition includes at least one alkaline material selected from the group consisting of alkali metal oxides, alkali metal hydroxides, alkali metal carbonates, alkali earth metal oxides, alkali earth metal hydroxides and alkali earth metal carbonates.
Claim 4
Dependent Claim
32 words
The system of claim 1 wherein said stripper composition includes an alkaline material selected from the group consisting of sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, barium hydroxide and strontium hydroxide.
Claim 5
Dependent Claim
15 words
The system of claim 1 wherein stripper composition includes an alkaline material and a liquid.
Claim 6
Dependent Claim
20 words
The system of claim 4 wherein said liquid is selected from the group consisting of inorganic liquids and organic liquids.
Claim 7
Dependent Claim
11 words
The system of claim 4 wherein said liquid comprises ammonium hydroxide.
Claim 8
Dependent Claim
11 words
The system of claim 1 wherein said cover means are flexible.
Claim 9
Dependent Claim
15 words
The system of claim 7 wherein said cover means comprises a fabric including pile elements.
Claim 10
Dependent Claim
11 words
The system of claim 8 wherein said cover means is felt.
Claim 11
Dependent Claim
18 words
The system of claim 8 wherein said cover means is an endless fibre fabric produced by needle punching.
Claim 12
Dependent Claim
106 words
A peel-away system for decomposing and stripping away a cured surface coating of paint or varnish from a surface, said system including: an alkaline stripper composition for decomposing said surface coating, said composition including an alkaline material selected from the group consisting of alkali earth metals and alkali metals and a liquid; and a flexible, semi-permeable cover including pile means, said cover adapted to cover said stripper composition and said surface coating and further adapted to lift a portion of decomposed surface coating from said surface by attachment between the pile means and the decomposed surface when said cover means is peeled away from said surface.
Claim 13
Dependent Claim
106 words
A peel-away system for decomposing and stripping away a cured surface coating of paint or varnish from a surface, said system including: an alkaline stripper composition for decomposing said surface coating, said composition including an alkaline material selected from the group consisting of alkali earth metals and alkali metals and a liquid; and a flexible, semi-permeable cover including pile means, said cover adapted to cover said stripper composition and said surface coating and further adapted to lift a portion of decomposed surface coating from said surface by attachment between the pile means and the decomposed surface when said cover means is peeled away from said surface.
Claim 14
Dependent Claim
38 words
The system of claim 11 wherein said alkaline material is selected from the group consisting of alkali metal oxides, alkali metal hydroxides, alkali metal carbonates, alkali earth metal oxides, alkali earth metal hydroxides and alkali earth metal carbonates.
Claim 15
Dependent Claim
57 words
The system of claim 11 wherein said alkaline material includes at least one alkali metal selected from the group consisting of alkali metal oxides, alkali metal hydroxides and alkali metal carbonates and at least one alkali earth metal selected from the group consisting of alkali earth metal oxides, alkali earth metal hydroxide and alkali earth metal carbonate.
Claim 16
Dependent Claim
41 words
The system of claim 13 wherein said alkali metal comprises between about 5% and about 15% by weight of the alkaline material and wherein the alkali earth metal comprises between about 85% and about 95% by weight of the alkaline material.
Claim 17
Dependent Claim
20 words
The system of claim 11 wherein said liquid is selected from the group consisting of inorganic liquids and organic liquids.
Claim 18
Dependent Claim
32 words
The system of claim 11 wherein said composition further includes an additive selected from the group consisting of accelerators, adhesives, carriers, corrosion inhibitors, dyes, foam producing agents, gelling agents, plasticizers and surfactants.
Claim 19
Dependent Claim
31 words
The system of claim 11 wherein said cover comprises a fabric material having a pile selected from the group consisting of felt, polypropylenes, polyalkylenes, polyamides, polyesters, polyvinylhalides, cotton, wool and fur.
Claim 20
Dependent Claim
19 words
The system of claim 11 wherein said cover includes fastener means for affixing said cover means to said surface.
Claim 21
Independent Claim
119 words
A method for stripping a cured surface coating of paint or varnish from a surface, said method comprising the steps of: providing a peel-away system for decomposing and stripping away said surface coating, said system including a stripper composition for decomposing said coating and cover means including pile means to which the decomposed surface coating may be attached, said cover means being adapted to cover said composition and said surface coating and further adapted to lift a portion of the decomposed surface coating from said surface; applying said composition and said cover means to said surface coating; permitting said composition to react with and decompose said surface coating; and stripping said surface coating by peeling away said cover means.
Claim 22
Independent Claim
119 words
A method for stripping a cured surface coating of paint or varnish from a surface, said method comprising the steps of: providing a peel-away system for decomposing and stripping away said surface coating, said system including a stripper composition for decomposing said coating and cover means including pile means to which the decomposed surface coating may be attached, said cover means being adapted to cover said composition and said surface coating and further adapted to lift a portion of the decomposed surface coating from said surface; applying said composition and said cover means to said surface coating; permitting said composition to react with and decompose said surface coating; and stripping said surface coating by peeling away said cover means.
Claim 23
Dependent Claim
24 words
The method of claim 19 wherein the composition is directly applied to the surface coating and the cover means are applied over said composition.
Claim 24
Dependent Claim
25 words
The method of claim 19 wherein the composition is applied to one side of the cover means which is then applied on the surface coating.
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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) | 1987-01-16 | 1987-07-18 | 1988-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-16 | 1991-07-18 | 1992-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-16 | 1995-07-18 | 1996-01-17 | $7700.00 | Window Closed / Lapsed |