US2942955A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aluminum etching composition and method
Assignee: Wyandotte Chemicals Corp
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Filing: 1957-05-20
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Granted: 1960-06-28
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Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Hannah Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:27
CPC Classifications
C; C23; C23F; C23F1/00; C23F1/10; C23F1/14; C23F1/32; C23F1/36
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
150 words
A PROCESS FOR ETCHING ALUMINUM WHICH COMPRISES CONTACTING AN ARTICLE OF ALUMINUM WITH AN AQUEOUS SOLUTION OF AN ALKALINE ETCHING PRODUCT, THE CONCENTRATION OF SAID ETCHING PRODUCT BEING IN THE RANGE OF ABOUT 2 TO ABOUT 16 OUNCES PER GALLON OF WATER, SAID ETCHING AGENT CONSISTING ESSENTIALLY OF (1) AN ALKALINE ETCHING AGENT SELECTED FROM THE GROUP CONSISTING OF SODIUM HYDROXIDE, POTASSIUM HYDROXIDE, AND MIXTURE THEREOF AND BEING IN THE PROPORTION OF ABOUT 75 TO 97.5 WEIGHT PERCENT, (2) AN ORGANIC POLYHYDROXY SCALE INHIBITOR SELECTED FROM THE GROUP CONSISTING OF MONASACCHARIDES, POLYSACCHARIDES, GUM ARABIC, GUM KARAYA, STARCHES, SYNTHETIC POLYSACCHARIDES, POLYHYDROXYMONOBASIC ACIDS, POLYTHYDROXY DIBASIC ACID AND MIXTURES THEREOF AND BEING IN THE PROPORTION OF ABOUT 1 TO 20 WEIGHT PERCENT AND (3) AN ETCHING RATE ACCELERATOR SELECTED FROM THE GROUP CONSISTING OF SODIUM CHROMATE, POTASSIUM CHROMATE AND MIXTURES THEREOF AND BEING IN THE PROPORTION OF ABOUT 0.25 TO 5 WEIGHT PERCENT.
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) | 1963-06-28 | 1963-12-28 | 1964-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-06-28 | 1967-12-28 | 1968-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-06-28 | 1971-12-28 | 1972-06-28 | $7700.00 | Window Closed / Lapsed |