Patent US2813812A successfully refreshed from Google Patents.
US2813812A
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Method for coating iron or zinc with phosphate composition and aqueous solution therefor
Assignee: Parker Rust Proof Co
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Filing: 1952-06-24
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Granted: 1957-11-19
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Expires: 1972-06-24
Abstract
No abstract record available.
Inventors
- 👤 Richard I Somers
- 👤 Rotsko John
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 20:30
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/36; C23C22/362; C23C22/07; C23C22/08; C23C22/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
AN AQUEOUS SOLUTION FOR COATING IRON OR ZINC SURFACES, SAID SOLUTION COMPRISING AS THE ESSENTIAL COATINGPRODUCING INGREDIENTS ABOUT 5% TO 2.5% PHOSPHATE ION, AN ION OF THE GROUP CONSISTING OF THE ZINC ION AND THE MANGANESE ION IN A PROPORTION TO FORM DIHYDROGEN PHOSPHATE WITH SAID PHOSPHATE ION, 0.01% TO 0.4% NICKEL ION, 0.0003% TO 0.005% COPPER ION, AND AT LEAST ONE OXIDIZING ION SELECTED FROM THE GROUP CONSISTING OF THE NITRATE ION AND NITRATE ION IN A CONCENTRATION OF ABOUT 0.2%-1% NITRATE ION AND 0.002% TO 0.008% NITRITE ION.
Claim 2
Dependent Claim
90 words
AN AQUEOUS SOLUTION FOR COATING IRON OR ZINC SURFACES, SAID SOLUTION COMPRISING AS THE ESSENTIAL COATINGPRODUCING INGREDIENTS ABOUT 5% TO 2.5% PHOSPHATE ION, AN ION OF THE GROUP CONSISTING OF THE ZINC ION AND THE MANGANESE ION IN A PROPORTION TO FORM DIHYDROGEN PHOSPHATE WITH SAID PHOSPHATE ION, 0.01% TO 0.4% NICKEL ION, 0.0003% TO 0.005% COPPER ION, AND AT LEAST ONE OXIDIZING ION SELECTED FROM THE GROUP CONSISTING OF THE NITRATE ION AND NITRATE ION IN A CONCENTRATION OF ABOUT 0.2%-1% NITRATE ION AND 0.002% TO 0.008% NITRITE ION.
References Cited (Backward Citations)
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Cited
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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) | 1960-11-18 | 1961-05-20 | 1961-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-11-18 | 1965-05-20 | 1965-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-11-18 | 1969-05-20 | 1969-11-19 | $7700.00 | Window Closed / Lapsed |