US2882171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibiting composition and method
Assignee: Dearborn Chemical Co
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Filing: 1956-11-14
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Granted: 1959-04-14
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Expires: 1976-11-14
Abstract
No abstract record available.
Inventors
- 👤 Wayne L Denman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 12:14
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
128 words
A METHOD OF PROTECTING METAL CONTACTING SURFACES AGAINST CORROSION BY A FLOWWIN GSTREAM OF A CORROSIVE AQUEOUS LIQUID WHICH COMPRISES ADDING TO SAID LIQUID STREAM AN AQUEOUS ALKALINE DISPERSION OF A FILM-FORMING ALIPHATIC AMINE CONTAINING FROM TWELVE TO TWENTY CARBON ATOMS PER MOLECULE AND NON-IONIC POLYHYDRIC SURFACE ACTIVE AGENT CONTAINING REPEATING OXYALKYLENE GROUPS HAVING NO MORE THAN THREE CARBON ATOMS PER GROUP, SAID AGENT BEING SELECTED FROM THE GROUP CONSISTING OF A POLYALKOXYLATED ALIPHATIC POLYAMINE AND A POLYOXYALKYLENE GLYCOL, SAID AGENT CONTAINING AT LEAST 15% BY WEIGHT OF OXYETHYLENE GROUPS, SAID AMINE BEING PRESENT IN SUFFICIENT AMOUNT TO FORM A PROTECTIVE FILM ON SAID METAL SURFACES AND IN AMOUNTS RANGING FROM 1 TO 20 PARTS BY WEIGHT OF SAID AGENT, AND FLOWING SAID STREAM PAST SAID METAL SURFACES.
Claim 2
Independent Claim
128 words
A METHOD OF PROTECTING METAL CONTACTING SURFACES AGAINST CORROSION BY A FLOWWIN GSTREAM OF A CORROSIVE AQUEOUS LIQUID WHICH COMPRISES ADDING TO SAID LIQUID STREAM AN AQUEOUS ALKALINE DISPERSION OF A FILM-FORMING ALIPHATIC AMINE CONTAINING FROM TWELVE TO TWENTY CARBON ATOMS PER MOLECULE AND NON-IONIC POLYHYDRIC SURFACE ACTIVE AGENT CONTAINING REPEATING OXYALKYLENE GROUPS HAVING NO MORE THAN THREE CARBON ATOMS PER GROUP, SAID AGENT BEING SELECTED FROM THE GROUP CONSISTING OF A POLYALKOXYLATED ALIPHATIC POLYAMINE AND A POLYOXYALKYLENE GLYCOL, SAID AGENT CONTAINING AT LEAST 15% BY WEIGHT OF OXYETHYLENE GROUPS, SAID AMINE BEING PRESENT IN SUFFICIENT AMOUNT TO FORM A PROTECTIVE FILM ON SAID METAL SURFACES AND IN AMOUNTS RANGING FROM 1 TO 20 PARTS BY WEIGHT OF SAID AGENT, AND FLOWING SAID STREAM PAST SAID METAL SURFACES.
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) | 1962-04-13 | 1962-10-13 | 1963-04-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-13 | 1966-10-13 | 1967-04-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-13 | 1970-10-13 | 1971-04-14 | $7700.00 | Window Closed / Lapsed |