US2514941A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for increasing the corrosion-resistance of metals
Assignee: Walterisation Co Ltd
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Filing: 1947-07-26
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Granted: 1950-07-11
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Expires: 1967-07-26
Abstract
No abstract record available.
Inventors
- 👤 Drysdale Royston Fraser
- 👤 Parker Ronald William
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:55
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/07; C23C22/08
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
58 words
A LIQUID COATING COMPOSITION FOR THE PRODUCTION OF A PROTECTIVE COATING ON THE SURFACE OF A METAL SELECTED FROM THE GROUP CONSISTING OF IRON, STEEL, ZINC, AND ALUMINUM, SAID LIQUID COATING COMPOSITION CONTAINING AN AQUEOUS SOLUTION OF A METAL PHOSPHATE AND PHOSPHORIC ACID AND CONTAINING ALSO IN DISSOLVED STATE A RELATIVELY SMALL AMOUNT OF ANHYDROUS ZINC AMMONIUM PHOSPHATE.
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) | 1953-07-10 | 1954-01-09 | 1954-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-07-10 | 1958-01-09 | 1958-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-07-10 | 1962-01-09 | 1962-07-11 | $7700.00 | Window Closed / Lapsed |