US2902447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition and method for inhibition of corrosion
Assignee: Dearborn Chemical Co
•
Filing: 1954-09-10
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Granted: 1959-09-01
•
Expires: 1974-09-10
Abstract
No abstract record available.
Inventors
- 👤 Lewis O Gunderson
- 👤 Kerst Herman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:24
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
104 words
THE METHOD OF INHIBITING THE CORROSION OF METALLIC SURFACES BY A CORROSIVE AQUEOUS LIQUID WHICH COMPRISES DISPERSING INTO SAID LIQUID A COMPLETELY ACYLATED ALIPHATIC POLYAMINE SELECTED FROM THE GROUP CONSISTING OF THOSE COMPLETELY ACYLATED WITH NAPHTHENIC ACIDS ALONE AND THOSE COMPLETELY ACYLATED WITH ACETIC ACID AND AN ACID SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC ACIDS HAVING AT LEAST EIGHT CARBON ATOMS IN THEIR MOLECULES, SAID ACYLATED POLYAMINE ACYLATED WITH ACETIC ACID CONTAINING A NUMBER OF ACETOYL RADICALS WHICH IS AT LEAST EQUAL TO THE NUMBER OF ACID RADICALS HAVING AT LEAST EIGHT CARBON ATOMS, AND FLOWING SAID LIQUID PAST SAID SURFACES.
Claim 2
Independent Claim
104 words
THE METHOD OF INHIBITING THE CORROSION OF METALLIC SURFACES BY A CORROSIVE AQUEOUS LIQUID WHICH COMPRISES DISPERSING INTO SAID LIQUID A COMPLETELY ACYLATED ALIPHATIC POLYAMINE SELECTED FROM THE GROUP CONSISTING OF THOSE COMPLETELY ACYLATED WITH NAPHTHENIC ACIDS ALONE AND THOSE COMPLETELY ACYLATED WITH ACETIC ACID AND AN ACID SELECTED FROM THE GROUP CONSISTING OF ALIPHATIC AND CYCLOALIPHATIC ACIDS HAVING AT LEAST EIGHT CARBON ATOMS IN THEIR MOLECULES, SAID ACYLATED POLYAMINE ACYLATED WITH ACETIC ACID CONTAINING A NUMBER OF ACETOYL RADICALS WHICH IS AT LEAST EQUAL TO THE NUMBER OF ACID RADICALS HAVING AT LEAST EIGHT CARBON ATOMS, AND FLOWING SAID LIQUID PAST SAID SURFACES.
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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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |