US3062612A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting metals against electrochemical corrosion of the acidic type
Assignee: IFP Energies nouvelles
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Filing: 1959-04-21
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Granted: 1962-11-06
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Expires: 1979-04-21
Abstract
No abstract record available.
Inventors
- 👤 Boucher Bernard Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:05
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A METHOD OF PROTECTING IRON AND STEEL SURFACES AGAINST ELECTRONOCHEMICAL CORROSIONIN AN ACIDIC AQUEOUS MEDIUM HAVING A CORROSION OF THE ACIDIC TYPE ON SAID METAL SURFACES AND AGAINST THE PENATRATION OF HYDROGEN DEVELOPED IN SUCH MEDIA, COMPRISING THE STEPS OF ADDING TO THE ACIDIC AQUEOUS MEDIUM A KNOWN ANTI-CORROSIVE AGENT SELECTED FROM THE GROUP CONSISTING OF LONG CHAIN ALIPHATIC FATTY ACIDS HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, ALIPHATIC AMINES, QUATERNARY AMMONIUM SALTS OF THE AFORESAID AMINES, AND HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, IMIDAZOLINES AND ORGANIC SULFIDIES HAVING THE FORMULA R-S-R'' WHEREIN R AND R'' ARE HYDROCARBONS RADICALS CONTAINING FROM 1 TO 20 CARBON ATOMS PER RADICAL, IN CORROISON-INHIBITING AMOUNTS, AND ADDING ALSO TO THE ACIDIC AQUEOUS MEDIUM FINELY DIVIDED ELEMENTARY SULFUR.
Claim 2
Independent Claim
126 words
A METHOD OF PROTECTING IRON AND STEEL SURFACES AGAINST ELECTRONOCHEMICAL CORROSIONIN AN ACIDIC AQUEOUS MEDIUM HAVING A CORROSION OF THE ACIDIC TYPE ON SAID METAL SURFACES AND AGAINST THE PENATRATION OF HYDROGEN DEVELOPED IN SUCH MEDIA, COMPRISING THE STEPS OF ADDING TO THE ACIDIC AQUEOUS MEDIUM A KNOWN ANTI-CORROSIVE AGENT SELECTED FROM THE GROUP CONSISTING OF LONG CHAIN ALIPHATIC FATTY ACIDS HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, ALIPHATIC AMINES, QUATERNARY AMMONIUM SALTS OF THE AFORESAID AMINES, AND HAVING AT LEAST 8 CARBON ATOMS PER MOLECULE, IMIDAZOLINES AND ORGANIC SULFIDIES HAVING THE FORMULA R-S-R'' WHEREIN R AND R'' ARE HYDROCARBONS RADICALS CONTAINING FROM 1 TO 20 CARBON ATOMS PER RADICAL, IN CORROISON-INHIBITING AMOUNTS, AND ADDING ALSO TO THE ACIDIC AQUEOUS MEDIUM FINELY DIVIDED ELEMENTARY SULFUR.
References Cited (Backward Citations)
US2470428A
Cited
US2453882A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-11-05 | 1966-05-07 | 1966-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-11-05 | 1970-05-07 | 1970-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-11-05 | 1974-05-07 | 1974-11-06 | $7700.00 | Window Closed / Lapsed |