Patent US2591479A successfully refreshed from Google Patents.
US2591479A
Expired / Lapsed
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Method of and solution for coating surfaces chiefly of zinc
Assignee: Parker Rust Proof Co
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Filing: 1947-05-12
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Granted: 1952-04-01
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Expires: 1967-05-12
Abstract
No abstract record available.
Inventors
- 👤 Herbert K Ward
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:25
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/34; C23C22/36; C23C22/362
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
65 words
THE METHOD FOR COATING ZINC SURFACES WHICH COMPRISES THE STEP OF TREATING THE SURFACE WITH AN AQUEOUS SOLUTION WHICH CONSISTS ESSENTIALLY OF ABOUT 1-2 PERCENT 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, AT LEAST 0.2 PERCENT NICKEL ION AND AT LEAST 0.16 PERCENT FLUOBORATE ION.
References Cited (Backward Citations)
US1911726A
Cited
US2276353A
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US2121574A
Cited
US2296844A
Cited
US2312855A
Cited
US2500673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-01 | 1955-10-01 | 1956-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-01 | 1959-10-01 | 1960-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-01 | 1963-10-01 | 1964-04-01 | $7700.00 | Window Closed / Lapsed |