Patent US2820731A successfully refreshed from Google Patents.
US2820731A
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Phosphate coating composition and method of coating metal therewith
Assignee: Oakite Products Inc
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Filing: 1955-03-21
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Granted: 1958-01-21
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Expires: 1975-03-21
Abstract
No abstract record available.
Inventors
- 👤 Jr Edward Heinzelman
- 👤 Stanley C Williamson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:53
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08; C23C22/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
A PHOSPHATE COATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING, PER GALLON OF WATER, AT LEAST ABOUT 0.06 OUNCE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND MANGANESE, SAID METAL BEING PRESENT IN THE FORM OF A COMPOUND AT LEAST ABOUT 0.07 OUNCE OF AT LEAST ONE ANION OF AN OZIDIZING COMPOUND, PHOSPHORIC ACID IN AN AMOUNT AT LEAST 15% IN EXCESS OF THE AMOUNT NECESSARY TO REACT WITH SUCH METAL, AND AT LEAST 0.0009 OUNCE OF ZIRCONIUM IN THE FORM OF A COMPOUND IN WHICH THE ZIRCONIUM IS PRESENT IN BASIC FORM.
Claim 2
Dependent Claim
99 words
A PHOSPHATE COATING BATH CONSISTING ESSENTIALLY OF AN AQUEOUS SOLUTION CONTAINING, PER GALLON OF WATER, AT LEAST ABOUT 0.06 OUNCE OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF ZINC AND MANGANESE, SAID METAL BEING PRESENT IN THE FORM OF A COMPOUND AT LEAST ABOUT 0.07 OUNCE OF AT LEAST ONE ANION OF AN OZIDIZING COMPOUND, PHOSPHORIC ACID IN AN AMOUNT AT LEAST 15% IN EXCESS OF THE AMOUNT NECESSARY TO REACT WITH SUCH METAL, AND AT LEAST 0.0009 OUNCE OF ZIRCONIUM IN THE FORM OF A COMPOUND IN WHICH THE ZIRCONIUM IS PRESENT IN BASIC FORM.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-20 | 1961-07-22 | 1962-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-20 | 1965-07-22 | 1966-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-20 | 1969-07-22 | 1970-01-21 | $7700.00 | Window Closed / Lapsed |