US4780235A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Paint remover
Assignee: EIDP Inc
•
Filing: 1987-04-16
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Granted: 1988-10-25
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Expires: 2007-04-16
Abstract
Abstract A low toxicity paint remover composition containing C 1 to C 4 dialkyl esters of C 4 to C 6 aliphatic dibasic acid, an activator, a thickener, a surfactant and at least one other organic nonhalogen-containing solvent.
Inventors
- 👤 Harold L. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:37
CPC Classifications
C; C09; C09D; C09D9/00; C09D9/005; C09D9/04
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
98 words
A paint removing composition consisting essentially of (a) at least 20% by weight of at least one C 1 to C 4 dialkyl ester of a C 4 to C 6 aliphatic dibasic acid, (b) 0.1 to 5% by weight of an activator, selected from the group consisting of formic acid, acetic acid and oxalic acid or selected from the group consisting of ammonium hydroxide and monoethanolamine, (c) an effective amount of at least one thickener, (d) an effective amount of a compatible surfactant, and (e) from 1 to 80% by weight of at least one nonhalogen-containing-organic solvent.
Claim 2
Dependent Claim
98 words
A paint removing composition consisting essentially of (a) at least 20% by weight of at least one C 1 to C 4 dialkyl ester of a C 4 to C 6 aliphatic dibasic acid, (b) 0.1 to 5% by weight of an activator, selected from the group consisting of formic acid, acetic acid and oxalic acid or selected from the group consisting of ammonium hydroxide and monoethanolamine, (c) an effective amount of at least one thickener, (d) an effective amount of a compatible surfactant, and (e) from 1 to 80% by weight of at least one nonhalogen-containing-organic solvent.
Claim 3
Dependent Claim
28 words
The composition of claim 1 which consists of the listed components, and in which the nonhalogen-containing-organic solvent is selected from the class consisting of high flash point solvents.
Claim 4
Dependent Claim
36 words
The composition of claim 2 in which the high flash point solvent is at least one member of the group consisting of N-methyl-2-pyrrolidone, esters of monoalkyl ether dipropylene glycol, and esters of monoalkyl ether tripropylene glycol.
Claim 5
Dependent Claim
16 words
The composition of claim 1 in which the nonhalogen solvent is a blend of aromatic hydrocarbons.
Claim 6
Dependent Claim
20 words
The composition of claim 1 in which the thickener is present in an amount of 0.5 to 10% by weight.
Claim 7
Dependent Claim
27 words
The composition of claim 5 in which the thickener is selected from the class consisting of ethyl cellulose, hydroxypropyl cellulose, organic modified clay, and hydrogenated castor oil.
Claim 8
Dependent Claim
29 words
The composition of claim 1 in which the surfactant is selected from the class consisting of potassium oleate, dioctyl ester of sodium sulfosuccinic acid, and sodium alkyl napthalene sulfonate.
Claim 9
Dependent Claim
18 words
The composition of claim 1 in which the activator is ammonium hydroxide, and the nonhalogen-containing-organic solvent is N-methyl-2-pyrrolidone.
Claim 10
Dependent Claim
53 words
The composition of claim 1 in which the C 1 to C 4 dialkyl ester of a C 4 to C 6 aliphatic dibasic acid is present in the amount of at least 40% by weight, and the nonhalogen-containing organic solvent is present in the amount of between 1 and 60% by weight.
Claim 11
Dependent Claim
18 words
The composition of claim 1 in which the nonhalogen-containing-organic solvent is N-methyl-2-pyrrolidone, and the activator is acetic acid.
References Cited (Backward Citations)
US3806460A
Cited
US3972839A
Cited
US4120810A
Cited
US4477288A
Cited
US4666626A
Cited
US4673524A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |