US2580773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for coating aluminum with zinc
Assignee: Philadelphia Rust-Proof Co
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Filing: 1948-07-31
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Granted: 1952-01-01
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Expires: 1968-07-31
Abstract
No abstract record available.
Inventors
- 👤 Heiman Samuel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:42
CPC Classifications
C; C23; C23C; C23C18/00; C23C18/16; C23C18/31
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
85 words
THE METHO OF COATING ALUMINUM ARTICLES WITH AN ADHERENT SMOOTH DEPOSIT OF ZINC WHICH COMPRISES CLEANING THE ALUMINUM ARTICLE TO REMOVE SUBSTANTIALLY ALL OF THE SURFACE OXIDE FILM AND IMMERSING THE CLEANED ALUMINUM ARTICLE IN AN AQUEOUS BATH CONSISTING ESSENTIALLY OF WATER, A WATER-SOLUBLE ZINC SALT AND A WATER-SOLUBLE FLUORIDE, THE CONCENTRATION OF THE ZINC SALT IN SAID BATH BEING IN THE RANGE OF 3 N TO 7 N AND THE CONCENTRATION OF THE FLUORIDE BEING IN THE RANGE OF 0.2 N TO 2.5 N.
Claim 2
Dependent Claim
85 words
THE METHO OF COATING ALUMINUM ARTICLES WITH AN ADHERENT SMOOTH DEPOSIT OF ZINC WHICH COMPRISES CLEANING THE ALUMINUM ARTICLE TO REMOVE SUBSTANTIALLY ALL OF THE SURFACE OXIDE FILM AND IMMERSING THE CLEANED ALUMINUM ARTICLE IN AN AQUEOUS BATH CONSISTING ESSENTIALLY OF WATER, A WATER-SOLUBLE ZINC SALT AND A WATER-SOLUBLE FLUORIDE, THE CONCENTRATION OF THE ZINC SALT IN SAID BATH BEING IN THE RANGE OF 3 N TO 7 N AND THE CONCENTRATION OF THE FLUORIDE BEING IN THE RANGE OF 0.2 N TO 2.5 N.
Claim 3
Dependent Claim
67 words
AN IMMERSION AQUEOUS BATH FOR DEPOSITING METALLIC ZINC ON A CLEAN ALUMINUM SURFACE SUBSTANTIALLY FREE OF SURFACE OXIDE FILM WHICH CONSISTS ESSENTIALLY OF WATER, A WATER-SOLUBLE ZINC SALT AND A WATER-SOLUBLE FLUORIDE, THE CONCENTRATION OF THE ZINC SALT IN SAID BATH BEING IN THE RANGE OF 3 N TO 7 N AND THE CONCENTRATION OF THE FLUORIDE BEING IN THE RANGE OF 0.2 N TO 2.5 N.
Claim 4
Dependent Claim
67 words
AN IMMERSION AQUEOUS BATH FOR DEPOSITING METALLIC ZINC ON A CLEAN ALUMINUM SURFACE SUBSTANTIALLY FREE OF SURFACE OXIDE FILM WHICH CONSISTS ESSENTIALLY OF WATER, A WATER-SOLUBLE ZINC SALT AND A WATER-SOLUBLE FLUORIDE, THE CONCENTRATION OF THE ZINC SALT IN SAID BATH BEING IN THE RANGE OF 3 N TO 7 N AND THE CONCENTRATION OF THE FLUORIDE BEING IN THE RANGE OF 0.2 N TO 2.5 N.
References Cited (Backward Citations)
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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) | 1954-12-31 | 1955-07-02 | 1956-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-12-31 | 1959-07-02 | 1960-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-12-31 | 1963-07-02 | 1964-01-01 | $7700.00 | Window Closed / Lapsed |