Patent US2939772A successfully refreshed from Google Patents.
US2939772A
Expired / Lapsed
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Process for etching aluminum and aluminum alloy surfaces
Assignee: Turco Products Inc
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Filing: 1955-07-18
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Granted: 1960-06-07
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Expires: 1975-07-18
Abstract
No abstract record available.
Inventors
- 👤 Kenneth W Newman
- 👤 Jr Don C Atkins
- 👤 Gordon S Douglas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:52
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD OF ETCHING AN ARTICLE HAVING AN ALUMINUM SURFACE, WHICH COMPRISES TREATING SAID SURFACE WITH AN ETCHING SOLUTION CONTAINING AN ALKALI MATERIAL AND A COMPOUND OF A METAL OF THE GROUP CONSISTING OF CHROMIUM, TITANIUM, VANADIUM, AND MANGANESE, SAID SOLUTION HAVING AN ALKALINITY AND OH ION CONCENTRATION EQUIVALENT TO THAT PRODUCED BY ABOUT 0.1 TO 10 MOLS NAOH PER LITER OF SOLUTION, AND THE AMOUNT OF SAID COMPOUND PRESENT BEING FROM ABOUT 0.1 TO 10% CALCULATED ON THE EQUIVALENT WEIGHT OF NAOH TO PRODUCE SAID ALKALINITY AND HYDROXYL ION CONCENTRATION, AND PRODUCING AN ALUMINUM SURFACE FREE OF ANY SUBSTANTIAL OXIDE COATING.
Claim 2
Independent Claim
102 words
A METHOD OF ETCHING AN ARTICLE HAVING AN ALUMINUM SURFACE, WHICH COMPRISES TREATING SAID SURFACE WITH AN ETCHING SOLUTION CONTAINING AN ALKALI MATERIAL AND A COMPOUND OF A METAL OF THE GROUP CONSISTING OF CHROMIUM, TITANIUM, VANADIUM, AND MANGANESE, SAID SOLUTION HAVING AN ALKALINITY AND OH ION CONCENTRATION EQUIVALENT TO THAT PRODUCED BY ABOUT 0.1 TO 10 MOLS NAOH PER LITER OF SOLUTION, AND THE AMOUNT OF SAID COMPOUND PRESENT BEING FROM ABOUT 0.1 TO 10% CALCULATED ON THE EQUIVALENT WEIGHT OF NAOH TO PRODUCE SAID ALKALINITY AND HYDROXYL ION CONCENTRATION, AND PRODUCING AN ALUMINUM SURFACE FREE OF ANY SUBSTANTIAL OXIDE COATING.
References Cited (Backward Citations)
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US2446060A
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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) | 1963-06-07 | 1963-12-07 | 1964-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-07 | 1967-12-07 | 1968-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-07 | 1971-12-07 | 1972-06-07 | $7700.00 | Window Closed / Lapsed |