US2736658A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of protecting metal surfaces from corrosion and corrosion inhibitor compositions
Assignee: Armour and Co
•
Filing: 1952-07-23
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Granted: 1956-02-28
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Expires: 1972-07-23
Abstract
No abstract record available.
Inventors
- 👤 Frank W Pfohl
- 👤 Vance P Gregory
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
C; C10; C10L; C10L1/00; C10L1/10; C10L1/14; C10L1/22; C10M; C10M1/00; C10M1/08; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; C23F11/143; C10M2201/00; C10M2201/10; C10M2201/102; C10M2201/103; C10M2215/00; C10M2215/02; C10M2215/04; C10M2215/044; C10M2215/24; C10M2215/26; C10N; C10N2030/00; C10N2030/12; C10N2050/00; C10N2050/10; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
123 words
THE METHOD OF INHIBITING CORROSION OF A FERROUS METAL SURFACE, COMPRISING FORMING AN ADSORBED PROTECTIVE FILM ON SAID METAL SURFACE OF THE SALT REACTION PRODUCT OF A POLYAMINE COMPOUND WITH AN ACID, SAID POLYAMINE COMOUND CONTAINING AT LEAST 2 AMINE GROUPS IN ITS MOLECULAR STRUCTURE CONNECTED BY A POLYMETHYLENE GROUP HAVING FROM 2 TO 6 METHYLENE GROUPS, ONE OF SAID AMINE GROUPS BEING CONNECTED TO A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC RADICALS DERIVED FROM FATTY ACIDS HAVING FROM 8 TO 22 CARBON ATOMS AND ALICYLIC RADICALS DERIVED FROM ROSIN ACIDS, SAID ACID REACTED WITH SAID POLYAMINE COMPOUND TO FORM A SALT THEREOF BEING SELECTED FROM THE GROUP CONSISTING OF FATTY AND ROSIN ACIDS CONTAINING FROM 6 TO 22 CARBON ATOMS.
Claim 2
Independent Claim
123 words
THE METHOD OF INHIBITING CORROSION OF A FERROUS METAL SURFACE, COMPRISING FORMING AN ADSORBED PROTECTIVE FILM ON SAID METAL SURFACE OF THE SALT REACTION PRODUCT OF A POLYAMINE COMPOUND WITH AN ACID, SAID POLYAMINE COMOUND CONTAINING AT LEAST 2 AMINE GROUPS IN ITS MOLECULAR STRUCTURE CONNECTED BY A POLYMETHYLENE GROUP HAVING FROM 2 TO 6 METHYLENE GROUPS, ONE OF SAID AMINE GROUPS BEING CONNECTED TO A RADICAL SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC RADICALS DERIVED FROM FATTY ACIDS HAVING FROM 8 TO 22 CARBON ATOMS AND ALICYLIC RADICALS DERIVED FROM ROSIN ACIDS, SAID ACID REACTED WITH SAID POLYAMINE COMPOUND TO FORM A SALT THEREOF BEING SELECTED FROM THE GROUP CONSISTING OF FATTY AND ROSIN ACIDS CONTAINING FROM 6 TO 22 CARBON ATOMS.
Claim 3
Dependent Claim
35 words
A COMPOSITION FOR USE IN CONTROLLING CORROSION OF METAL SURFACES, COMPRISING A PROTECTIVE GREASE COMPOSED MAINLY OF A GELLED HYDROCARBON OIL IN ADMIXTURE WITH AT LEAST 1 PERCENT BY WEIGHT OF AN N-TALLOW-TRIMETHYLENE DIAMINE OLEATE.
Claim 4
Dependent Claim
35 words
A COMPOSITION FOR USE IN CONTROLLING CORROSION OF METAL SURFACES, COMPRISING A PROTECTIVE GREASE COMPOSED MAINLY OF A GELLED HYDROCARBON OIL IN ADMIXTURE WITH AT LEAST 1 PERCENT BY WEIGHT OF AN N-TALLOW-TRIMETHYLENE DIAMINE OLEATE.
References Cited (Backward Citations)
US2400785A
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US2267204A
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US2244712A
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US2564422A
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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) | 1959-02-27 | 1959-08-29 | 1960-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-02-27 | 1963-08-29 | 1964-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-02-27 | 1967-08-29 | 1968-02-28 | $7700.00 | Window Closed / Lapsed |