Patent US4920061A successfully refreshed from Google Patents.
US5019288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning composition for copper and copper alloys and method of manufacture thereof
Assignee: CHEM-SHIELD Inc A CORP OF NEVADA
•
Filing: 1989-12-22
•
Granted: 1991-05-28
•
Expires: 2009-12-22
Abstract
Abstract An acidic solution for use as a cleaning composition for copper and copper alloys includes a solution of from about 1-20 weight percent hydrochloric acid and approximately 80-99 weight percent of an aqueous hydrochloric acid-based composition which has a pH of less than about 1.0 yet is substantially non-reactive with compounds having low oxidative states, including human skin tissue.
Inventors
- 👤 Silverio M. Garcia
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 10:01
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/10; C23G1/103
Claims Analysis
Total Claims: 42
Claim 1
Independent Claim
62 words
An acidic solution for use as a cleaning composition for , copper and copper alloys thereof, said composition comprising a solution of from about 1-20 weight percent hydrochloric acid, and about 80-99 weight percent of an aqueous hydrochloric acid based composition having a pH of less than about 1.0, yet substantially non-reactive with compounds having low oxidative states including human skin tissue.
Claim 2
Dependent Claim
62 words
An acidic solution for use as a cleaning composition for , copper and copper alloys thereof, said composition comprising a solution of from about 1-20 weight percent hydrochloric acid, and about 80-99 weight percent of an aqueous hydrochloric acid based composition having a pH of less than about 1.0, yet substantially non-reactive with compounds having low oxidative states including human skin tissue.
Claim 3
Dependent Claim
42 words
The acidic solution of claim 1, wherein said hydrochloric acid-based composition comprises a dilute, aqueous hydrochloric acid-based solution admixed with an effective amount of at least one weak acid to produce strong conjugate bases to control the disassociation production of hydronium ions.
Claim 4
Dependent Claim
51 words
The acidic solution as claimed in claim 2, wherein said hydrochloric acid-based composition comprises a dilute aqueous solution of hydrochloric acid and phosphoric acid admixed with an effective amount of at least one weak organic acid to produce strong conjugate bases to further control hydrochloric acid disassociation production of hydronium ions.
Claim 5
Dependent Claim
50 words
The acidic solution as claimed in claim 3, wherein said hydrochloric acid-based composition comprises an aqueous mixture of about 5-20 weight percent hydrochloric and about 5-20 weight percent phosphoric acid admixed with approximately 1-5 weight percent of an hydroxy carboxylic acid and approximately 1-5 weight percent of a dicarboxylic acid.
Claim 6
Dependent Claim
25 words
The acidic solution as claimed in claim 4, wherein said hydrochloric acid based composition further comprises about 1-3 weight percent of a poly methyl amine.
Claim 7
Dependent Claim
27 words
The acidic solution as claimed in claim 4, wherein said hydroxy carboxylic acid is selected from the group consisting of citric acid, tartaric acid, and malic acid.
Claim 8
Dependent Claim
18 words
The acidic solution as claimed in claim 6, wherein said hydroxy carboxylic acid is comprised of citric acid.
Claim 9
Dependent Claim
30 words
The acidic solution as claimed in claim 4, wherein said dicarboxylic acid is selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid and adipic acid.
Claim 10
Dependent Claim
15 words
The acidic solution as claimed in claim 8, wherein said dicarboxylic acid comprises oxalic acid.
Claim 11
Dependent Claim
23 words
The acidic solution as claimed in claim 5, wherein said poly methyl amine is selected from the group consisting of hexamethylenetetramine, and hexamethylenediamine.
Claim 12
Dependent Claim
15 words
The acidic solution as claimed in claim 10, wherein said poly methyl amine comprises hexamethylenetetramine.
Claim 13
Dependent Claim
22 words
The acidic solution as claimed in claim 4, wherein said solution further comprises approximately 2-3 weight percent of an acid thickening agent.
Claim 14
Dependent Claim
41 words
The acidic solution as claimed in claim 1, wherein said solution comprises a solution of approximately 15 weight percent hydrochloric acid, approximately 83 weight percent of said aqueous hydrochloric acid-based composition, and approximately 2 weight percent of an acid thickening agent.
Claim 15
Dependent Claim
51 words
The acidic solution as claimed in claim 13, wherein said hydrochloric acid-based composition comprises an aqueous mixture of about 5-20 weight percent hydrochloric acid and about 5-20 weight percent phosphoric acid admixed with approximately 1-5 weight percent of an hydroxy carboxylic acid and approximately 1-5 weight percent of a dicarboxylic acid.
Claim 16
Dependent Claim
50 words
The acidic solution as claimed in claim 14, wherein said hydroxy carboxylic acid is selected from the group consisting of citric acid, tartaric acid, and malic acid, and wherein said dicarboxylic acid is selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid and adipic acid.
Claim 17
Dependent Claim
24 words
The acidic solution as claimed in claim 15, wherein said hydroxy carboxylic acid comprises citric acid, and wherein said dicarboxylic acid comprises oxalic acid.
Claim 18
Dependent Claim
24 words
The acidic solution as claimed in claim 16, wherein said hydrochloric acid-based composition further comprises about 1-3 weight percent of a poly methyl amine.
Claim 19
Dependent Claim
103 words
A process for preparing an acidic solution for use as a copper and copper alloy cleaning composition having a pH of less than about 1.0 while being non-reactive with human skin tissue, comprising admixing approximately 1-20 weight percent hydrochloric acid with approximately 80-99 weight percent of an aqueous acid-based composition, said aqueous acid-based composition being prepared by the steps of: admixing from about 5-20 weight percent hydrochloric acid with about 5-20 weight percent phosphoric acid to produce an acidic mixture; and admixing said acidic mixture with an effective amount of water to produce an aqueous acid-based composition having approximately 47-87 weight percent water.
Claim 20
Dependent Claim
103 words
A process for preparing an acidic solution for use as a copper and copper alloy cleaning composition having a pH of less than about 1.0 while being non-reactive with human skin tissue, comprising admixing approximately 1-20 weight percent hydrochloric acid with approximately 80-99 weight percent of an aqueous acid-based composition, said aqueous acid-based composition being prepared by the steps of: admixing from about 5-20 weight percent hydrochloric acid with about 5-20 weight percent phosphoric acid to produce an acidic mixture; and admixing said acidic mixture with an effective amount of water to produce an aqueous acid-based composition having approximately 47-87 weight percent water.
Claim 21
Dependent Claim
40 words
The process as claimed in claim 18, wherein said aqueous acid-based composition is admixed with an effective amount of at least one weak organic acid to produce strong conjugate bases to control hydrochloric acid dissociation production of hydronium ions therein.
Claim 22
Dependent Claim
34 words
The process of claim 19, wherein said aqueous acid-based composition is further admixed with approximately 1-5 weight percent of a hydroxy carboxylic acid and with from about 1-5 weight percent of a dicarboxylic acid.
Claim 23
Dependent Claim
26 words
The process as claimed in claim 20, wherein said hydroxy carboxylic acid is selected from the group consisting of citric acid, tartaric acid, and malic acid.
Claim 24
Dependent Claim
29 words
The process as claimed in claim 20, wherein said dicarboxylic acid is selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid and adipic acid.
Claim 25
Dependent Claim
22 words
The process as claimed in claim 20, wherein said hydroxy carboxylic acid comprises citric acid and said dicarboxylic acid comprises oxalic acid.
Claim 26
Dependent Claim
19 words
The process as claimed in claim 20, wherein said acid-based composition is further admixed with a poly methyl amine.
Claim 27
Dependent Claim
49 words
The process as claimed in claim 18, wherein said 5-20 weight percent phosphoric acid functions as a controller for hydronium ion production by the disassociation of hydrochloric acid in water, and wherein said hydronium ion production is further controlled by adding an effective amount of yet another weak acid.
Claim 28
Dependent Claim
53 words
The process as claimed in claim 25, wherein said weak acid comprises hydroxy carboxylic acid, and further comprises the step of adding yet a third weak acid to control hydronium ion production created by the disassociation of hydrochloric acid in water as well as created by the addition of said hydroxy carboxylic acid.
Claim 29
Dependent Claim
16 words
The process as claimed in claim 26, wherein said additional weak acid comprises a dicarboxylic acid.
Claim 30
Dependent Claim
25 words
The process as claimed in claim 18, wherein said process further comprises admixing approximately 2-3 weight percent of an acid thickening agent in said composition.
Claim 31
Dependent Claim
84 words
An acidic cleaning composition for copper and copper alloys comprising approximately 1-20 weight percent hydrochloric acid and approximately 80-99 weight percent of an aqueous hydrochloric acid-based composition having a pH of approximately less than 1.0 and prepared by the steps of: admixing from about 5-20 weight percent hydrochloric acid with about 5-20 weight percent phosphoric acid to produce an acidic mixture; and admixing said acidic mixture with an effective amount of water to produce an aqueous acid-based composition having approximately 47-87 weight percent water.
Claim 32
Dependent Claim
84 words
An acidic cleaning composition for copper and copper alloys comprising approximately 1-20 weight percent hydrochloric acid and approximately 80-99 weight percent of an aqueous hydrochloric acid-based composition having a pH of approximately less than 1.0 and prepared by the steps of: admixing from about 5-20 weight percent hydrochloric acid with about 5-20 weight percent phosphoric acid to produce an acidic mixture; and admixing said acidic mixture with an effective amount of water to produce an aqueous acid-based composition having approximately 47-87 weight percent water.
Claim 33
Dependent Claim
41 words
A cleaning composition as claimed in claim 29, wherein said aqueous acid-based composition is admixed with an effective amount of at least one weak organic acid to produce strong conjugate bases to control hydrochloric acid dissociation production of hydronium ions therein.
Claim 34
Dependent Claim
35 words
The cleaning composition of claim 30, wherein said aqueous acid-based composition is further admixed with approximately 1-5 weight percent of a hydroxy carboxylic acid and with from about 1-5 weight percent of a dicarboxylic acid.
Claim 35
Dependent Claim
27 words
The cleaning composition as claimed in claim 31, wherein said hydroxy carboxylic acid is selected from the group consisting of citric acid, tartaric acid, and malic acid.
Claim 36
Dependent Claim
30 words
The cleaning composition as claimed in claim 31, wherein said dicarboxylic acid is selected from the group consisting of oxalic acid, malonic acid, succinic acid, glutaric acid and adipic acid.
Claim 37
Dependent Claim
23 words
The cleaning composition as claimed in claim 31, wherein said hydroxy carboxylic acid comprises citric acid and said dicarboxylic acid comprises oxalic acid.
Claim 38
Dependent Claim
20 words
The cleaning composition as claimed in claim 31, wherein said acid-based composition is further admixed with a poly methyl amine.
Claim 39
Dependent Claim
50 words
The cleaning composition as claimed in claim 29, wherein said 5-20 weight percent phosphoric acid functions as a controller for hydronium ion production by the disassociation of hydrochloric acid in water, and wherein said hydronium ion production is further controlled by adding an effective amount of yet another weak acid.
Claim 40
Dependent Claim
54 words
The cleaning composition as claimed in claim 36, wherein said weak acid comprises hydroxy carboxylic acid, and further comprises the step of adding yet a third weak acid to control hydronium ion production created by the disassociation of hydrochloric acid in water as well as created by the addition of said hydroxy carboxylic acid.
Claim 41
Dependent Claim
17 words
The cleaning composition as claimed in claim 37, wherein said additional weak acid comprises a dicarboxylic acid.
Claim 42
Dependent Claim
22 words
The cleaning composition as claimed in claim 29, wherein said composition further comprises approximately 2-3 weight percent of an acid thickening agent.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-05-27 | 1994-11-26 | 1995-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-27 | 1998-11-26 | 1999-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-27 | 2002-11-26 | 2003-05-28 | $7700.00 | Window Closed / Lapsed |