US2787565A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of metal surfaces
Assignee: GEN PER LA FOSFATAZIONE SpA
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Filing: 1953-05-29
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Granted: 1957-04-02
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Expires: 1973-05-29
Abstract
No abstract record available.
Inventors
- 👤 Pretto Erminio De
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 17:33
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
112 words
A LIQUID SALT COMPOSITION ADAPTED TO BE DILUTED WITH WATER IN AN AMOUNT SUCH THAT SAID COMPOSITION IS BETWEEN 1-20% BY WEIGHT OF THE DILUTED SOLUTION WHICH IS ADAPTED TO BE USED FOR THE TREATMENT OF METALLIC SURFACES, SAID LIQUID SALT COMPOSITION ESSENTIALLY CONSISTING OF AT LEAST ONE METALLIC PHOSPHATE, AT LEAST ONE METALLIC NITRATE, FREE PHOSPHORIC ACCID, FREE NITRIC ACID AND AT LEAST ONE PHOSPHOPROTEIN, SAID PHOSPHORPROTEIN BEING PRESENT IN AN AMOUNT LESS THAN THE AMOUNT OF SAID FREE ACIDS AND AT LEAST IN AN AMOUNT OF 0.3% BY WEIGHT OF SAID LIQUID SALT COMPOSITION, THE TOTAL ACIDITY OF SAID LIQUID SALT COMPOSITION BEING BETWEEN 3-7 TIMES THE FREE ACIDITY THEREOF.
Claim 2
Dependent Claim
112 words
A LIQUID SALT COMPOSITION ADAPTED TO BE DILUTED WITH WATER IN AN AMOUNT SUCH THAT SAID COMPOSITION IS BETWEEN 1-20% BY WEIGHT OF THE DILUTED SOLUTION WHICH IS ADAPTED TO BE USED FOR THE TREATMENT OF METALLIC SURFACES, SAID LIQUID SALT COMPOSITION ESSENTIALLY CONSISTING OF AT LEAST ONE METALLIC PHOSPHATE, AT LEAST ONE METALLIC NITRATE, FREE PHOSPHORIC ACCID, FREE NITRIC ACID AND AT LEAST ONE PHOSPHOPROTEIN, SAID PHOSPHORPROTEIN BEING PRESENT IN AN AMOUNT LESS THAN THE AMOUNT OF SAID FREE ACIDS AND AT LEAST IN AN AMOUNT OF 0.3% BY WEIGHT OF SAID LIQUID SALT COMPOSITION, THE TOTAL ACIDITY OF SAID LIQUID SALT COMPOSITION BEING BETWEEN 3-7 TIMES THE FREE ACIDITY THEREOF.
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) | 1960-04-01 | 1960-10-01 | 1961-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-04-01 | 1964-10-01 | 1965-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-04-01 | 1968-10-01 | 1969-04-02 | $7700.00 | Window Closed / Lapsed |