US2526544A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing a metallic coating on magnesium and its alloys
Assignee: Dow Chemical Co
•
Filing: 1947-10-06
•
Granted: 1950-10-17
•
Expires: 1967-10-06
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 23:44
CPC Classifications
C; C25; C25D; C25D5/00; C25D5/34; C25D5/42
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
IN A METHOD OF FORMING AN ADHERENT METALLIC COATING UPON THE SURFACE OF AN ARTICLE OF MAGNESIUM AND ITS ALLOYS, THE STEP WHICH COMPRISES TREATING THE SURFACE OF THE ARTICLE WITH AN ALKALINE AQUEOUS SOLUTION HAVING A PH BETWEEN ABOUT 8 AND 11 AND CONSISTING ESSENTIALLY OF WATER, AN ALKALI METAL PYROPHOSPHATE, AND A WATER-SOLUBLE ZINC SALT SELECTED FROM THE GROUP CONSISTING OF ZINC ACETATE, ZINC BORATE, ZINC BROMIDE, ZINC CHLORIDE, ZINC CYANIDE, ZINC FLUORIDE, ZINC SULFATE, THE CONCENTRATION OF THE PYROPHOSPHATE REDICAL BEING BETWEEN 0.6 AND 27 GRAMS AND THAT OF THE ZINC BEING BETWEEN 0.1 AND 4 GRAMS PER 100 GRAMS OF THE SOLUTION, WHEREBY A COATING OF METALLIC ZINC IS DEPOSITED IN SITU ON THE SURFACE OF THE ARTICLE.
Claim 2
Dependent Claim
122 words
IN A METHOD OF FORMING AN ADHERENT METALLIC COATING UPON THE SURFACE OF AN ARTICLE OF MAGNESIUM AND ITS ALLOYS, THE STEP WHICH COMPRISES TREATING THE SURFACE OF THE ARTICLE WITH AN ALKALINE AQUEOUS SOLUTION HAVING A PH BETWEEN ABOUT 8 AND 11 AND CONSISTING ESSENTIALLY OF WATER, AN ALKALI METAL PYROPHOSPHATE, AND A WATER-SOLUBLE ZINC SALT SELECTED FROM THE GROUP CONSISTING OF ZINC ACETATE, ZINC BORATE, ZINC BROMIDE, ZINC CHLORIDE, ZINC CYANIDE, ZINC FLUORIDE, ZINC SULFATE, THE CONCENTRATION OF THE PYROPHOSPHATE REDICAL BEING BETWEEN 0.6 AND 27 GRAMS AND THAT OF THE ZINC BEING BETWEEN 0.1 AND 4 GRAMS PER 100 GRAMS OF THE SOLUTION, WHEREBY A COATING OF METALLIC ZINC IS DEPOSITED IN SITU ON THE SURFACE OF THE ARTICLE.
References Cited (Backward Citations)
US744170A
Cited
US1607676A
Cited
US1627900A
Cited
US1801629A
Cited
US2297241A
Cited
US2313756A
Cited
US2419190A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-10-16 | 1954-04-17 | 1954-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-10-16 | 1958-04-17 | 1958-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-10-16 | 1962-04-17 | 1962-10-17 | $7700.00 | Window Closed / Lapsed |