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Patent US3993482A successfully refreshed from Google Patents.
US3993482A
Expired / Lapsed
US
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Anticorrosion zinc based coating material
Assignee: Dalmine SpA
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Filing: 1975-01-08
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Granted: 1976-11-23
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Expires: 1995-01-08
Abstract
Abstract A zinc based coating material useful for protecting ferrous surfaces against corrosion, also including magnesium, aluminum and chromium, wherein the percentage rato Mg/Al is between 1.5 and 5, the percentage ratio Cr/Mg is comprised between 0.03 and 0.2 and the amount of magnesium is between 1% and 5% by weight.
Inventors
- 👤 Roberto Brunno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 14:39
CPC Classifications
C; C23; C23C; C23C30/00; C22; C22C; C22C18/00; C23C2/00; C23C2/04; C23C2/06; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12771; Y10T428/12785; Y10T428/12792; Y10T428/12799
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
57 words
A zinc based coating material, for use in protecting ferrous surfaces against corrosion, said material also including magnesium, aluminum and chromium in which the percentage ratio between magnesium and aluminum is between 1.5 and 5, the percentage ratio between chromium and magnesium is between 0.03 and 0.2, and the amount of magnesium is between 1% and 5%.
Claim 2
Dependent Claim
57 words
A zinc based coating material, for use in protecting ferrous surfaces against corrosion, said material also including magnesium, aluminum and chromium in which the percentage ratio between magnesium and aluminum is between 1.5 and 5, the percentage ratio between chromium and magnesium is between 0.03 and 0.2, and the amount of magnesium is between 1% and 5%.
Claim 3
Dependent Claim
31 words
The coating material of claim 1 in which the ratio between the magnesium and aluminum percentage values is between 1.5 and 3 and the magnesium content is between 1% and 3%.
Claim 4
Dependent Claim
12 words
The coating material of claim 1, further comprising up to 2% aluminum.
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) | 1979-11-23 | 1980-05-24 | 1980-11-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-23 | 1984-05-24 | 1984-11-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-23 | 1988-05-24 | 1988-11-23 | $7700.00 | Window Closed / Lapsed |