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US2901409A
Expired / Lapsed
US
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Anodizing magnesium
Assignee: Dow Chemical Co
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Filing: 1956-08-03
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Granted: 1959-08-25
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Expires: 1976-08-03
Abstract
No abstract record available.
Inventors
- 👤 Long Herbert K De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:22
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D11/00; C25D11/02; C25D11/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN ANODIZING BATH CONSISTING OF AN AQUEOUS SOLUTION OF WATER-SOLUBLE INORGANIC COMPOUDS YIELDING IN THE AQUEOUS SOLUTION THE RADICALS; AMMONIUM, FLUORIDE, PHOSPHATE, SODIUM, AND HEXAVALENT CHROMIUM, THE AMOUNT BY WEIGHT OF THE AMMONIUM RADICAL BEING BETWEEN 3.2 AND 15 PERCENT, THAT OF THE FLUORIDE RADICAL BEING AT LEAST 6 PERCENT, THAT OF THE PHOSPHATE RADICAL CALCULATED AS PO4 BEING BETWEEN 2 AND 10 PERCENT, THAT OF THE SODIUM RADICAL BEING BETWEEN 0.3 AND 5 PERCENT AND THAT OF THE HEXAVALENT CHROMIUM RADICAL BEING BETWEEN ABOUT 0.3 AND 5 PERCENT, AND SUFFICIENT MINERAL ACID TO GIVE THE SOLUTION A PH BETWEEN 0.5 AND 4.
Claim 2
Dependent Claim
103 words
AN ANODIZING BATH CONSISTING OF AN AQUEOUS SOLUTION OF WATER-SOLUBLE INORGANIC COMPOUDS YIELDING IN THE AQUEOUS SOLUTION THE RADICALS; AMMONIUM, FLUORIDE, PHOSPHATE, SODIUM, AND HEXAVALENT CHROMIUM, THE AMOUNT BY WEIGHT OF THE AMMONIUM RADICAL BEING BETWEEN 3.2 AND 15 PERCENT, THAT OF THE FLUORIDE RADICAL BEING AT LEAST 6 PERCENT, THAT OF THE PHOSPHATE RADICAL CALCULATED AS PO4 BEING BETWEEN 2 AND 10 PERCENT, THAT OF THE SODIUM RADICAL BEING BETWEEN 0.3 AND 5 PERCENT AND THAT OF THE HEXAVALENT CHROMIUM RADICAL BEING BETWEEN ABOUT 0.3 AND 5 PERCENT, AND SUFFICIENT MINERAL ACID TO GIVE THE SOLUTION A PH BETWEEN 0.5 AND 4.
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) | 1962-08-24 | 1963-02-23 | 1963-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-24 | 1967-02-23 | 1967-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-24 | 1971-02-23 | 1971-08-25 | $7700.00 | Window Closed / Lapsed |