US2851386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for coating zinc and zinc alloy sheets
Assignee: Allied Res Products Inc
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Filing: 1954-05-05
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Granted: 1958-09-09
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Expires: 1974-05-05
Abstract
No abstract record available.
Inventors
- 👤 Harry J Hartman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:15
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/37
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
98 words
A METHOD OF TREATING ZINC AND ZINC ALLOY MILL-GALVANIZED SHEETS TO PRODUCE THEREON A CLEAR PROTECTIVE COATING WHICH COMPRISES SUBJECTING THE SAME TO AN AQUEOUS ACIDIC SOLUTION COMPRISING WATER, A T LEAST ONE CHROMIC COMPOUND SELECTED FROM THE GROUP CONSISING OF CHROMIC ACID AND WATER SOLUBLE SALTS THEREOF, AT LEAST ONE BORIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND WATER SOLUBLE SALTS THEREOF, AT LEAST ONE ALKALI METAL SALT OF FLUOSILICIC ACID AND AN ACID OF SUFFICIENT STRENGTH AND IN SUFFICIENT AMOUNT TO ADJUST THE PH OF THE RESULTING SOLUTION BETWEEN ABOUT 0.8 TO 4.
Claim 2
Independent Claim
98 words
A METHOD OF TREATING ZINC AND ZINC ALLOY MILL-GALVANIZED SHEETS TO PRODUCE THEREON A CLEAR PROTECTIVE COATING WHICH COMPRISES SUBJECTING THE SAME TO AN AQUEOUS ACIDIC SOLUTION COMPRISING WATER, A T LEAST ONE CHROMIC COMPOUND SELECTED FROM THE GROUP CONSISING OF CHROMIC ACID AND WATER SOLUBLE SALTS THEREOF, AT LEAST ONE BORIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF BORIC ACID AND WATER SOLUBLE SALTS THEREOF, AT LEAST ONE ALKALI METAL SALT OF FLUOSILICIC ACID AND AN ACID OF SUFFICIENT STRENGTH AND IN SUFFICIENT AMOUNT TO ADJUST THE PH OF THE RESULTING SOLUTION BETWEEN ABOUT 0.8 TO 4.
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) | 1961-09-08 | 1962-03-10 | 1962-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-09-08 | 1966-03-10 | 1966-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-09-08 | 1970-03-10 | 1970-09-09 | $7700.00 | Window Closed / Lapsed |