US4116853A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for cleaning aluminum at low temperatures
Assignee: Henkel Corp
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Filing: 1976-12-30
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Granted: 1978-09-26
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Expires: 1996-12-30
Abstract
Abstract Acid cleaning of aluminum surfaces is accomplished by 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
2026-10-28 03:34
CPC Classifications
C; C23; C23G; C23G1/00; C23G1/02; C23G1/12; C23G1/125; C11; C11D; C11D7/00; C11D7/02; C11D7/04; C11D7/08
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
99 words
An aqueous cleaning composition for removing and dissolving aluminum fines and lubricating oils from an aluminum surface comprising hydrofluoric acid present in an amount of at least about 0.005 grams/liter of cleaning solution, sulfuric acid present in an amount from about 1.0 gram/liter to about 10 grams/liter of cleaning solution and a surfactant present in an amount from about 0.1 gram/liter to about 10 grams/liter of cleaning solution the hydrofluoric acid being present in an amount such that the composition has an aluminum dissolution rate from about 8 to about 25 milligrams per square foot of aluminum surface treated.
Claim 2
Dependent Claim
99 words
An aqueous cleaning composition for removing and dissolving aluminum fines and lubricating oils from an aluminum surface comprising hydrofluoric acid present in an amount of at least about 0.005 grams/liter of cleaning solution, sulfuric acid present in an amount from about 1.0 gram/liter to about 10 grams/liter of cleaning solution and a surfactant present in an amount from about 0.1 gram/liter to about 10 grams/liter of cleaning solution the hydrofluoric acid being present in an amount such that the composition has an aluminum dissolution rate from about 8 to about 25 milligrams per square foot of aluminum surface treated.
Claim 3
Dependent Claim
34 words
A composition according to claim 1 wherein the hydrofluoric acid is present in an amount such that the aluminum dissolution rate is from 9 to 20 milligrams per square foot of aluminum surface treated.
Claim 4
Dependent Claim
22 words
The composition of claim 2 wherein the surfactant is selected from the group consisting of nonionic and anionic surfactants and mixtures thereof.
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) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |