US4009115A
Expired / Lapsed
US
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Composition and method for cleaning aluminum at low temperatures
Assignee: Henkel Corp
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Filing: 1975-08-25
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Granted: 1977-02-22
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Expires: 1995-08-25
Abstract
Abstract Acid cleaning of aluminum surfaces is accomplished employing a composition comprising Hydrofluoric acid and Sulfuric acid. More specifically, this invention relates to a composition and method for treating aluminum containers at low temperatures.
Inventors
- 👤 Robert Eric Binns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:55
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
40 words
An aqueous cleaning composition for removing and dissolving aluminum fines and cleaning lubricating oils from aluminum surfaces comprising of from about 1 to about 10 grams/liter of sulfuric acid and from about 0.005 to about 0.1 grams/liter of hydrofluoric acid.
Claim 2
Dependent Claim
40 words
An aqueous cleaning composition for removing and dissolving aluminum fines and cleaning lubricating oils from aluminum surfaces comprising of from about 1 to about 10 grams/liter of sulfuric acid and from about 0.005 to about 0.1 grams/liter of hydrofluoric acid.
Claim 3
Dependent Claim
15 words
The composition of claim 1, wherein the pH is from about 1.0 to about 1.8.
Claim 4
Dependent Claim
19 words
The composition of claim 1, further comprising a surfactant in an amount from about 0.1 to about 10 grams/liter.
Claim 5
Dependent Claim
19 words
The composition of claim 3, wherein the surfactant is selected from the group consisting of nonionic and anionic surfactants.
Claim 6
Dependent Claim
24 words
The composition of claim 4, wherein the surfactant is selected from the group consisting of sodium 2-ethyl hexyl sulfate and an alkyl polyethoxylated ether.
Claim 7
Dependent Claim
54 words
An aqueous cleaning composition for removing and dissolving aluminum fines and cleaning lubricating oils from aluminum surfaces consisting essentially of about 3 to about 5 grams/liter of sulfuric acid, from about 0.01 to about 0.03 grams/liter of hydrofluoric acid, and from about 0.1 to about 10 grams/liter of an alkyl polyethoxylated ether nonionic surfactant.
Claim 8
Dependent Claim
54 words
An aqueous cleaning composition for removing and dissolving aluminum fines and cleaning lubricating oils from aluminum surfaces consisting essentially of about 3 to about 5 grams/liter of sulfuric acid, from about 0.01 to about 0.03 grams/liter of hydrofluoric acid, and from about 0.1 to about 10 grams/liter of an alkyl polyethoxylated ether nonionic surfactant.
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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) | 1980-02-22 | 1980-08-23 | 1981-02-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-02-22 | 1984-08-23 | 1985-02-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-02-22 | 1988-08-23 | 1989-02-22 | $7700.00 | Window Closed / Lapsed |