Patent US2957782A successfully refreshed from Google Patents.
US2957782A
Expired / Lapsed
US
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Process for coating ferrous metals
Assignee: Boller Dev Corp
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Filing: 1956-07-13
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Granted: 1960-10-25
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 Ernest R Boller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:01
CPC Classifications
C; C23; C23C; C23C2/00; C23C2/04; C23C2/12; C23C2/003; C23C2/0038; C23C2/02; C23C2/024; C25; C25D; C25D3/00; C25D3/66; Y; Y10; Y10S; Y10S428/00; Y10S428/922; Y10S428/9335; Y10S428/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A PROCESS FOR COATING FERROUS METAL WHICH CONSISTS IN THE STEPS OF CLEANING THE SURFACE OF THE WORK TO BE COATED, THEN PLATING THE WORK, IN A FUSED CHLORIDE BATH WHICH CONSISTS OF AMMONIUM CHLORIDE AND AT LEAST TWO CHLORIDES SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES OF ZINC, SODIUM, POTASSIUM, LITHIUM, CALCIUM, MAGNESIUM AND BARIUM AT A TEMPERATURE BETWEEN THE MELTING POINT OF THE BATH AND ABOUT AND 650*C., WITH A NONFERROUS METAL HAVING A SOLUBILITY IN LIQUID ALUNINUM NOT EXCEEDING 8% BY WEIGHT AT 700*C., SAID BATH BEING SUBSTANTIALLY WATER-FREE AND OXYGEN-FREE AND INCLUDING THE CHLORIDE OF THE METAL TO BE DEPOSITED ON THE WORK IN AN AMOUNT BETWEEN 0.2% AND 3.0% OF THE MASS OF THE BATH, THEN CLEANING HEAVY METAL SALTS FROM THE WORK BY IMMERSING THE WORK IN A BATH CONSISTING OF FUSED ALKALI CHLORIDES AND WHICH IS FREE OF HEAVY METALS, AND THEN DIPPING THE WORK IN A MOLTEN METAL BATH WHOSE MAJOR CONSTITUENT IS ALUMINUM.
Claim 2
Dependent Claim
163 words
A PROCESS FOR COATING FERROUS METAL WHICH CONSISTS IN THE STEPS OF CLEANING THE SURFACE OF THE WORK TO BE COATED, THEN PLATING THE WORK, IN A FUSED CHLORIDE BATH WHICH CONSISTS OF AMMONIUM CHLORIDE AND AT LEAST TWO CHLORIDES SELECTED FROM THE GROUP CONSISTING OF THE CHLORIDES OF ZINC, SODIUM, POTASSIUM, LITHIUM, CALCIUM, MAGNESIUM AND BARIUM AT A TEMPERATURE BETWEEN THE MELTING POINT OF THE BATH AND ABOUT AND 650*C., WITH A NONFERROUS METAL HAVING A SOLUBILITY IN LIQUID ALUNINUM NOT EXCEEDING 8% BY WEIGHT AT 700*C., SAID BATH BEING SUBSTANTIALLY WATER-FREE AND OXYGEN-FREE AND INCLUDING THE CHLORIDE OF THE METAL TO BE DEPOSITED ON THE WORK IN AN AMOUNT BETWEEN 0.2% AND 3.0% OF THE MASS OF THE BATH, THEN CLEANING HEAVY METAL SALTS FROM THE WORK BY IMMERSING THE WORK IN A BATH CONSISTING OF FUSED ALKALI CHLORIDES AND WHICH IS FREE OF HEAVY METALS, AND THEN DIPPING THE WORK IN A MOLTEN METAL BATH WHOSE MAJOR CONSTITUENT IS ALUMINUM.
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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) | 1963-10-25 | 1964-04-25 | 1964-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-25 | 1968-04-25 | 1968-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-25 | 1972-04-25 | 1972-10-25 | $7700.00 | Window Closed / Lapsed |