Patent US2944919A successfully refreshed from Google Patents.
US2944919A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of applying a protective coating to a ferrous metal surface
Assignee: Amercoat Corp
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Filing: 1957-05-17
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Granted: 1960-07-12
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Expires: 1977-05-17
Abstract
No abstract record available.
Inventors
- 👤 Morris Lester
- 👤 Lombardo Flora
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:11
CPC Classifications
B; B05; B05D; B05D7/00; B05D7/14; Y; Y10; Y10T; Y10T428/00; Y10T428/31504; Y10T428/31678
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
THE METHOD OF PRODUCING A HARD IMPERVIOUS COATING UPON A FERROUS METAL SURFACE WHICH COMPRISES APPLYING TO SAID SURFACE FIRST (A) A PRIMARY COATING COMPRISING A MIXTURE OF A FINELY DIVIDED METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, MAGNESIUM, ALUMINUM, MANGANESE AND TITANIUM, AND FROM ABOUT 10% TO 40% BY WEIGHT BASED UPON SAID METAL OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF RED LEAD AND THE PEROXIDES OF CALCIUM, MAGNESIUM, AND ZINC, ALLOWING SAID PRIMARY COATING TO DRY, AND THEREAFTER APPLYING ON SAID PRIMARY COATING (B) A CURING AGENT FOR SAID MIXTURE COMPRISING AN AQUEOUS SOLUTION OF A WATER SOLUBLE SALT OF A POLYVALENT METAL, SAID POLYVALENT METAL HAVING AN OXIDATION-REDUCTION POTENTIAL IN ACID SOLUTION EQUAL TO OR GREATER THAN THAT OF SAID FINELY DIVIDED METAL.
Claim 2
Independent Claim
130 words
THE METHOD OF PRODUCING A HARD IMPERVIOUS COATING UPON A FERROUS METAL SURFACE WHICH COMPRISES APPLYING TO SAID SURFACE FIRST (A) A PRIMARY COATING COMPRISING A MIXTURE OF A FINELY DIVIDED METAL SELECTED FROM THE GROUP CONSISTING OF ZINC, MAGNESIUM, ALUMINUM, MANGANESE AND TITANIUM, AND FROM ABOUT 10% TO 40% BY WEIGHT BASED UPON SAID METAL OF AN OXIDIZING AGENT SELECTED FROM THE GROUP CONSISTING OF RED LEAD AND THE PEROXIDES OF CALCIUM, MAGNESIUM, AND ZINC, ALLOWING SAID PRIMARY COATING TO DRY, AND THEREAFTER APPLYING ON SAID PRIMARY COATING (B) A CURING AGENT FOR SAID MIXTURE COMPRISING AN AQUEOUS SOLUTION OF A WATER SOLUBLE SALT OF A POLYVALENT METAL, SAID POLYVALENT METAL HAVING AN OXIDATION-REDUCTION POTENTIAL IN ACID SOLUTION EQUAL TO OR GREATER THAN THAT OF SAID FINELY DIVIDED METAL.
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) | 1963-07-12 | 1964-01-11 | 1964-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-12 | 1968-01-11 | 1968-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-12 | 1972-01-11 | 1972-07-12 | $7700.00 | Window Closed / Lapsed |