Patent US4673523A successfully refreshed from Google Patents.
US4673523A
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Glass cleaning composition containing a cyclic anhydride and a poly(acrylamidomethylpropane) sulfonic acid to reduce friction
Assignee: Creative Products Resource Inc
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Filing: 1986-04-16
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Granted: 1987-06-16
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Expires: 2006-04-16
Abstract
Abstract A cleaning solution comprising a water-alcohol mixture, an anionic surfactant, a glycol ether, an anionic polysulfonic acid and an anhydride compound comprising an olefin-maleic anhydride copolymer, a monomeric cyclic anhydride or mixtures thereof, is disclosed which is employed to impregnate absorbent substrates to prepare applicators useful for cleaning glass surfaces.
Inventors
- 👤 James A. Smith
- 👤 George W. Kellett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:08
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/378; C11D17/00; C11D17/04; C11D17/049; C11D3/20; C11D3/2075; C11D3/2082; C11D3/34; C11D3/349; C11D3/43; C11D3/2003; C11D3/2006; C11D3/2068
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
98 words
A glass cleaning solution comprising: (a) about 0.005-1% of a monomeric cyclic anhydride having a molecular weight of about 100-500; (b) an amount of ammonia or an amine effective to solubilize said anhydride compound; (c) about 0.025-0.5% of poly(2-acrylamido-2-methyl propane) sulfonic acid; (d) an effective amount of an anionic surfactant; (e) an effective grease-solubilizing amount of a (C 1 -C 4 )alkylene (C 1 -C 4 ) alkyl ether or a (C 1 -C 4 ) dialkylene (C 1 -C 4 )alkyl ether; (f) about 5-25% of a (C 1 -C 4 ) alkanol; (g) the balance water.
Claim 2
Dependent Claim
98 words
A glass cleaning solution comprising: (a) about 0.005-1% of a monomeric cyclic anhydride having a molecular weight of about 100-500; (b) an amount of ammonia or an amine effective to solubilize said anhydride compound; (c) about 0.025-0.5% of poly(2-acrylamido-2-methyl propane) sulfonic acid; (d) an effective amount of an anionic surfactant; (e) an effective grease-solubilizing amount of a (C 1 -C 4 )alkylene (C 1 -C 4 ) alkyl ether or a (C 1 -C 4 ) dialkylene (C 1 -C 4 )alkyl ether; (f) about 5-25% of a (C 1 -C 4 ) alkanol; (g) the balance water.
Claim 3
Dependent Claim
67 words
The glass cleaning solution of claim 1 further comprising about 0.03-0.25% of a copolymer derived from (1) a maleic anhydride of the formula ##STR2## wherein R and R 1 are independently selected from the group consisting of H, (C 1 -C 4 ) alkyl, phenyl, (C 1 -C 4 ) alkylphenyl, phenyl (C 1 -C 4 ) alkylene and (2) a (C 1 -C 4 ) olefin.
Claim 4
Dependent Claim
25 words
The glass cleaning solution of claim 2 which comprises a mixture of about 0.05-0.175% of the copolymer and about 0.1-0.75% of the monomeric cyclic anhydride.
Claim 5
Dependent Claim
15 words
The glass cleaning solution of claim 1 wherein the monomeric cyclic anhydride is phthalic anhydride.
Claim 6
Dependent Claim
15 words
The glass cleaning solution of claim 1 wherein the copolymer is an ethylene-maleic anhydride copolymer.
Claim 7
Dependent Claim
14 words
The glass cleaning solution of claim 1 which has a pH of about 7.5-10.
Claim 8
Dependent Claim
26 words
The glass cleaning solution of claim 6 which comprises an amount of an alkanol amine effective to adjust the pH of the solution to about 8-9.75.
Claim 9
Dependent Claim
14 words
The glass cleaning solution of claim 7 which comprises about 0.05-0.75% of triethanol amine.
Claim 10
Dependent Claim
26 words
The glass cleaning solution of claim 1 wherein the (C 1 -C 4 )alkylene (C 1 14 C 4 )alkyl ether comprises propylene glycol monomethyl ether.
Claim 11
Dependent Claim
16 words
The glass cleaning solution of claim 1 which comprises an effective amount of a glycol plasticizer.
Claim 12
Dependent Claim
17 words
The glass cleaning solution of claim 10 which comprises about 0.1-1.0% of propylene glycol or ethylene glycol.
Claim 13
Dependent Claim
13 words
The glass cleaning solution of claim 1 which comprises about 0.1-1.0% of N-methyl-2-pyrrolidone
Claim 14
Dependent Claim
16 words
The glass cleaning solution of claim 1 wherein the anionic surfactant comprises a fatty alcohol-polyethylenoxysulfate salt.
Claim 15
Dependent Claim
18 words
The glass cleaning solution of claim 1 wherein the (C 1 -C 4 ) lower alkanol comprises isopropanol.
Claim 16
Dependent Claim
93 words
A glass cleaning solution comprising: (a) about 0.5-10% of an aqueous soltuion of about 5-15% phthalic anhydride and an amount of a basic compound effective to solubilize said copolymer; (b) about 0.04-0.25% of poly(acrylamidomethyl-propane) sulfonic acid; (c) about 0.01-0.3% of an anionic sulfonate or sulfate surfactant; (d) about 0.05-1.0% of a (C 1 -C 4 ) alkylene glycol (C 1 -C 4 )alkyl ether; (e) 5-25% of a (C 1 -C 4 ) lower alkanol; and (f) the balance water, wherein the pH of said glass cleaning solution is adjusted to about 8-9.5.
Claim 17
Dependent Claim
93 words
A glass cleaning solution comprising: (a) about 0.5-10% of an aqueous soltuion of about 5-15% phthalic anhydride and an amount of a basic compound effective to solubilize said copolymer; (b) about 0.04-0.25% of poly(acrylamidomethyl-propane) sulfonic acid; (c) about 0.01-0.3% of an anionic sulfonate or sulfate surfactant; (d) about 0.05-1.0% of a (C 1 -C 4 ) alkylene glycol (C 1 -C 4 )alkyl ether; (e) 5-25% of a (C 1 -C 4 ) lower alkanol; and (f) the balance water, wherein the pH of said glass cleaning solution is adjusted to about 8-9.5.
Claim 18
Dependent Claim
23 words
The glass cleaning solution of claim 15 wherein the pH of the solution is adjusted by the addition of about 0.05-0.75% triethanol amine.
Claim 19
Dependent Claim
13 words
The glass cleaning solution of claim 17 wherein the basic compound is ammonia.
Claim 20
Dependent Claim
26 words
An applicator for cleaning glass surfaces comprising a porous substrate impregnated with an effective amount of the glass cleaning solution of claims 1, 14 or 15.
Claim 21
Dependent Claim
14 words
The applicator of claim 18 wherein the porous substrate comprises a nonwoven cellulosic sheet.
Claim 22
Dependent Claim
20 words
A method for cleaning a soiled glass surface comprising applying the applicator of claim 18 thereto under conditions of pressure.
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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) | 1990-06-15 | 1990-12-15 | 1991-06-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-15 | 1994-12-15 | 1995-06-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-15 | 1998-12-15 | 1999-06-16 | $7700.00 | Window Closed / Lapsed |