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US3592701A
Expired / Lapsed
US
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Process for phosphating galvanized metal articles
Assignee: MAN-GILL CHEMICAL COMPANY AN OH CORP
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Filing: 1967-11-30
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Granted: 1971-07-13
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Expires: 1987-11-30
Abstract
Abstract PHOSPHATING SOLUTIONS WITH A TOTAL ACIDITY OF ABOUT 5850 POINTS AND CONSISTING ESSENTIALLY OF WATER, CALCIUM ION (PREFERABLY ABOUT 0.01-8.0%), PHOSPHATE ION (PREFERABLY ABOUT 0.25-20.0%), AND NICKEL ION (PREFERABLY ABOUT 0.005-2%) ARE USEFUL FOR TREATING GALVANIZED METAL ARTICLES. THESE SOLUTIONS MAY ALSO CONTAIN ABOUT 0.01-26% OF NITRATE ION, ABOUT 0.001-01% OF NITRITE ION AND ABOUT 0.1-1.0% OF AMMONIUM ION. THEY ARE APPLIED BY CONTACTING THE METAL SURFACE WITH THE SOLUTION AT A TEMPERATURE OF AT LEAST ABOUT 100*F.
Inventors
- 👤 Howard G Pekar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:19
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-12 | 1975-01-11 | 1975-07-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-12 | 1979-01-11 | 1979-07-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-12 | 1983-01-11 | 1983-07-13 | $7700.00 | Window Closed / Lapsed |