Patent US5597420A successfully refreshed from Google Patents.
US5597420A
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Stripping composition having monoethanolamine
Assignee: Ashland LLC
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Filing: 1995-01-17
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Granted: 1997-01-28
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Expires: 2015-01-17
Abstract
Abstract The invention teaches an aqueous stripping composition that is essentially free of any hydroxylamine compounds. The composition consists essentially of an aqueous mixture of monoethanolamine and preferably includes an inhibitor. The composition is particularly useful for cleaning substrates containing organic residues.
Inventors
- 👤 Irl E. Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 22:05
CPC Classifications
C; C11; C11D; C11D7/00; C11D7/22; C11D7/26; C11D7/265; C09; C09D; C09D9/00; C11D7/261; C11D7/32; C11D7/3218; C23; C23G; C23G1/00; C23G1/14; C23G1/16; C23G1/18
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
57 words
A stripping composition free of hydroxylamine compounds, consisting essentially of the admixture of monoethanolamine in an amount of about 70 to 95% weight, about 8 to 2% by weight of a corrosion inhibitor which is a compound selected from the group consisting of catechol, pyrogallol, anthranilic acid, gallic acid and gallic ester and the balance being water.
Claim 2
Dependent Claim
57 words
A stripping composition free of hydroxylamine compounds, consisting essentially of the admixture of monoethanolamine in an amount of about 70 to 95% weight, about 8 to 2% by weight of a corrosion inhibitor which is a compound selected from the group consisting of catechol, pyrogallol, anthranilic acid, gallic acid and gallic ester and the balance being water.
Claim 3
Dependent Claim
21 words
The stripping composition of claim 1 wherein the inhibitor is of the type that forms a coordination complex with the substrate.
Claim 4
Dependent Claim
31 words
The stripping composition of claim 2 wherein the monoethanolamine compound is about 77% by weight, the inhibitor is about 5% by weight and the aqueous portion is about 18% by weight.
Claim 5
Dependent Claim
40 words
A process of removing an organic residue from an inorganic substrate comprising contacting the organic residue with an effective amount of the stripping composition of claim 1 for an effective period of time and removing the residue from the substrate.
Claim 6
Dependent Claim
40 words
A process of removing an organic residue from an inorganic substrate comprising contacting the organic residue with an effective amount of the stripping composition of claim 3 for an effective period of time and removing the residue from the substrate.
References Cited (Backward Citations)
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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) | 2000-01-28 | 2000-07-29 | 2001-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-01-28 | 2004-07-29 | 2005-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-01-28 | 2008-07-29 | 2009-01-28 | $7700.00 | Window Closed / Lapsed |