Patent US3052575A successfully refreshed from Google Patents.
US3052575A
Expired / Lapsed
US
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Method of inhibiting corrosion
Assignee: Inland Steel Co
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Filing: 1961-02-13
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Granted: 1962-09-04
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Expires: 1981-02-13
Abstract
No abstract record available.
Inventors
- 👤 Wilbur G Crane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:33
CPC Classifications
C; C23; C23C; C23C22/00; C23C22/05; C23C22/06; C23C22/40
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
A METHOD OF TREATING A FERROUS METAL SURFACE TO INCREASZE THE RESISTANCE THEREOF TO CORROSION, COMPRISING CONTACTING A SURFACE OF A FERROUS METAL WITH AN AQUEOUS SOLUTION CONTAINING ABOUT 0.5% BY WEIGHT OF A WATER SOLUBLE NITRITE SALT AND ABOUT 0.5% BY WEIGHT OF A WATER SOLUBLE COMPOUND YIELDING MOLYBDIC ACID IN SAID SOLUTION WHILE MAINTAINING SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 180*F. AND ABOUT 200*F. AND MAINTAINING THE SOLUTION IN CONTACT WITH THE METAL SURFACE FOR A PERIOD OF ABOUT 2 TO 4 SECONDS, AND THEREAFTER DRYING THE TREATED METAL SURFACE; WHEREBY THE METAL SURFACE IS PROVIDED WITH A THIN PROTECTIVE FILM WHICH IS HIGHLY RESISTANT TO CORROSION.
Claim 2
Independent Claim
110 words
A METHOD OF TREATING A FERROUS METAL SURFACE TO INCREASZE THE RESISTANCE THEREOF TO CORROSION, COMPRISING CONTACTING A SURFACE OF A FERROUS METAL WITH AN AQUEOUS SOLUTION CONTAINING ABOUT 0.5% BY WEIGHT OF A WATER SOLUBLE NITRITE SALT AND ABOUT 0.5% BY WEIGHT OF A WATER SOLUBLE COMPOUND YIELDING MOLYBDIC ACID IN SAID SOLUTION WHILE MAINTAINING SAID SOLUTION AT A TEMPERATURE BETWEEN ABOUT 180*F. AND ABOUT 200*F. AND MAINTAINING THE SOLUTION IN CONTACT WITH THE METAL SURFACE FOR A PERIOD OF ABOUT 2 TO 4 SECONDS, AND THEREAFTER DRYING THE TREATED METAL SURFACE; WHEREBY THE METAL SURFACE IS PROVIDED WITH A THIN PROTECTIVE FILM WHICH IS HIGHLY RESISTANT TO CORROSION.
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) | 1965-09-03 | 1966-03-05 | 1966-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-09-03 | 1970-03-05 | 1970-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-09-03 | 1974-03-05 | 1974-09-04 | $7700.00 | Window Closed / Lapsed |