US2665232A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and solution for treating zinc surfaces to inhibit formation of white rust
Assignee: United States Steel Corp
•
Filing: 1950-12-18
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Granted: 1954-01-05
•
Expires: 1970-12-18
Abstract
No abstract record available.
Inventors
- 👤 Richard A Neish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:32
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/24
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
47 words
IN A METHOD OF RETARDING THE FORMATION OF WHITE RUST ON ZINC SURFACES, THE STEPS INCLUDING APPLYING TO THE SURFACES A DILUTE AQUEOUS SOLUTION OF AN ALKALI-METAL SALT OF CHROMIC ACID AND SODIUM SILICATE, AND DRYING THE APPLIED SOLUTION TO FORM A MICROSCOPIC FILM ON SAID SURFACES.
Claim 2
Dependent Claim
47 words
IN A METHOD OF RETARDING THE FORMATION OF WHITE RUST ON ZINC SURFACES, THE STEPS INCLUDING APPLYING TO THE SURFACES A DILUTE AQUEOUS SOLUTION OF AN ALKALI-METAL SALT OF CHROMIC ACID AND SODIUM SILICATE, AND DRYING THE APPLIED SOLUTION TO FORM A MICROSCOPIC FILM ON SAID SURFACES.
Claim 3
Dependent Claim
48 words
A SOLUTION FOR THE TREATMENT OF ZINC-SURFACED ARTICLES TO RETARD THE FORMATION OF WHITE RUST THEREON CONSISTING ESSENTIALLY OF FROM 10 TO 40 ML. OF ABOUT 40* BE. WATERGLASS PER LITER OF SOLUTION, FROM 1. TO 1% OF AN ALKALI-METAL SALT OF CHROMIC ACID AND THE BALANCE WATER.
Claim 4
Dependent Claim
48 words
A SOLUTION FOR THE TREATMENT OF ZINC-SURFACED ARTICLES TO RETARD THE FORMATION OF WHITE RUST THEREON CONSISTING ESSENTIALLY OF FROM 10 TO 40 ML. OF ABOUT 40* BE. WATERGLASS PER LITER OF SOLUTION, FROM 1. TO 1% OF AN ALKALI-METAL SALT OF CHROMIC ACID AND THE BALANCE WATER.
References Cited (Backward Citations)
GB453226A
Cited
US2314818A
Cited
US2431728A
Cited
US2499231A
Cited
US2494909A
Cited
US2548420A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-01-04 | 1957-07-06 | 1958-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-04 | 1961-07-06 | 1962-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-04 | 1965-07-06 | 1966-01-05 | $7700.00 | Window Closed / Lapsed |