US2795490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for etching aluminum alloy surfaces
Assignee: Turco Products Inc
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Filing: 1955-01-31
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Granted: 1957-06-11
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Expires: 1975-01-31
Abstract
No abstract record available.
Inventors
- 👤 Newman Kenneth Walter
- 👤 Jr Don C Atkins
- 👤 Gordon S Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:28
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
A METHOD OF ETCHING AN ARTICLE HAVING AN ALUMINUM ALLOY SURFACE TO PRODUCE A SMOOTH SUBSTANTIALLY NODULEFREE ETCHED SURFACE, WHICH COMPRISES TREATING SAID ALLOY SURFACE WITH AN ALKALI ETCHING SOLUTION HAVING DISSOLVED THEREIN A SULFUR-CONTAINING MATERIAL OF THE CLASS CONSISTING OF THOSE HAVING A REACTIVE SULFUR AND THOSE HAVING A REACTIVE SH-GROUP, SAID SULFUR-CONTAINING MATERIAL BEING CAPABLE OF FORMING A PRECIPITATE WITH AN ION TAKEN FROM THE GROUP CONSISTING OF COPPER, ZINC AND IRON IONS WHEN A SOLUTION CONTAINING SUCH ION IS ADDED TO AN ALKALI SOLUTION OF SAID SULFUR-CONTAINING MATERIAL.
Claim 2
Independent Claim
91 words
A METHOD OF ETCHING AN ARTICLE HAVING AN ALUMINUM ALLOY SURFACE TO PRODUCE A SMOOTH SUBSTANTIALLY NODULEFREE ETCHED SURFACE, WHICH COMPRISES TREATING SAID ALLOY SURFACE WITH AN ALKALI ETCHING SOLUTION HAVING DISSOLVED THEREIN A SULFUR-CONTAINING MATERIAL OF THE CLASS CONSISTING OF THOSE HAVING A REACTIVE SULFUR AND THOSE HAVING A REACTIVE SH-GROUP, SAID SULFUR-CONTAINING MATERIAL BEING CAPABLE OF FORMING A PRECIPITATE WITH AN ION TAKEN FROM THE GROUP CONSISTING OF COPPER, ZINC AND IRON IONS WHEN A SOLUTION CONTAINING SUCH ION IS ADDED TO AN ALKALI SOLUTION OF SAID SULFUR-CONTAINING MATERIAL.
References Cited (Backward Citations)
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US1639070A
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US1785513A
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Cited
US2628199A
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US2650875A
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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) | 1960-06-10 | 1960-12-10 | 1961-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-06-10 | 1964-12-10 | 1965-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-06-10 | 1968-12-10 | 1969-06-11 | $7700.00 | Window Closed / Lapsed |