Patent US2550709A successfully refreshed from Google Patents.
US2550709A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of coating ferrous metals with magnesium and magnesiumbase alloys
Assignee: Dow Chemical Co
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Filing: 1947-05-02
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Granted: 1951-05-01
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Expires: 1967-05-02
Abstract
No abstract record available.
Inventors
- 👤 Clyde A Moe
- 👤 John S Peake
- 👤 George T Sermon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 09:43
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
177 words
THE METHOD OF PRODUCING AN ADHERENT COATING OF A COATING METAL OF THE GROUP CONSISTING OF MAGNESIUM AND MAGNESIUM ALLOYS UPON ARTICLES OF FERROUS METAL WHICH COMPRISES INTRODUCING THE ARTICLE TO BE COATED INTO A MOLTEN BODY OF THE COATING METAL THROUGH A FLUX LAYER FLOATING UPON SAID MOLTEN BODY OF COATING METAL, THE FLUX CONSISTING OF A MIXTURE OF 20 TO 80 PARTS OF SODIUM CHLORIDE AND 80 TO 20 PARTS OF POTASSIUM CHLORIDE TO WHICH IS ADDED PER 100 PARTS OF SAID MIXTURE, FROM ABOUT 1 TO 20 PARTS OF MAGNESIUM FLUORIDE, SAID FLUX CONTAINING NOT MORE THAN ABOUT 5 PER CENT OF MAGNESIUM CHLORIDE, WHEREBY THE SURFACE OF THE ARTICLE IS FIRST FLUXED AND THEN BROUGHT INTO CONTACT WITH THE COATING METAL, HOLDING THE ARTICLE IN THE MOLTEN COATING METAL SO AS TO PERMIT THE SAME TO DISPLACE THE FLUX FROM AND WET THE SURFACE OF THE ARTICLE, AND THEN WITHDRAWING THE WETTED ARTICLE FROM THE MOLTEN BODY OF COATING METAL THROUGH THE FLUX LAYER, AND COOLING THE WITHDRAWN ARTICLE IN AN INERT ATMOSPHERE.
Claim 2
Independent Claim
177 words
THE METHOD OF PRODUCING AN ADHERENT COATING OF A COATING METAL OF THE GROUP CONSISTING OF MAGNESIUM AND MAGNESIUM ALLOYS UPON ARTICLES OF FERROUS METAL WHICH COMPRISES INTRODUCING THE ARTICLE TO BE COATED INTO A MOLTEN BODY OF THE COATING METAL THROUGH A FLUX LAYER FLOATING UPON SAID MOLTEN BODY OF COATING METAL, THE FLUX CONSISTING OF A MIXTURE OF 20 TO 80 PARTS OF SODIUM CHLORIDE AND 80 TO 20 PARTS OF POTASSIUM CHLORIDE TO WHICH IS ADDED PER 100 PARTS OF SAID MIXTURE, FROM ABOUT 1 TO 20 PARTS OF MAGNESIUM FLUORIDE, SAID FLUX CONTAINING NOT MORE THAN ABOUT 5 PER CENT OF MAGNESIUM CHLORIDE, WHEREBY THE SURFACE OF THE ARTICLE IS FIRST FLUXED AND THEN BROUGHT INTO CONTACT WITH THE COATING METAL, HOLDING THE ARTICLE IN THE MOLTEN COATING METAL SO AS TO PERMIT THE SAME TO DISPLACE THE FLUX FROM AND WET THE SURFACE OF THE ARTICLE, AND THEN WITHDRAWING THE WETTED ARTICLE FROM THE MOLTEN BODY OF COATING METAL THROUGH THE FLUX LAYER, AND COOLING THE WITHDRAWN ARTICLE IN AN INERT ATMOSPHERE.
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) | 1954-04-30 | 1954-10-30 | 1955-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-04-30 | 1958-10-30 | 1959-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-04-30 | 1962-10-30 | 1963-05-01 | $7700.00 | Window Closed / Lapsed |