US2745809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and composition for combating corrosion
Assignee: Dow Chemical Co
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Filing: 1953-04-14
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Granted: 1956-05-15
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Expires: 1973-04-14
Abstract
No abstract record available.
Inventors
- 👤 Paul H Cardwell
- 👤 Jr Edwin N Alderman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:38
CPC Classifications
C; C10; C10G; C10G75/00; C10G75/02; C09; C09K; C09K8/00; C09K8/54; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A COMPOSITION EFFECTIVE IN COMBATING CORROSION OF FERRUGINOUS MATERIALS CONSISTING ESSENTIALLY OF A MIXTURE OF (A) FROM 25 TO 65 PER CENT BY WEIGHT OF AT LEAST ONE QUATERNARY AMMONIUM HALIDE WHEREIN ALL OF THE ORGANIC SUBSTITUENTS ARE HYDROCARBON RADICALS CONTAINING UP TO 18 CARBON ATOMS, AT LEAST ONE OF SUCH RADICALS BEING AN ALIPHATIC HYDROCARBON RADICAL CONTAINING FROM 8 TO 18 CARBON ATOMS AND EACH OF TWO OF SUCH RADICALS BEING LOWER ALKYL RADICALS HAVING FROM 1 TO 3 CARBON ATOMS; (B) FROM 2 TO 30 PER CENT BY WEIGHT OF AT LEAST ONE AMINE HAVING THE GENERAL FORMULA:
Claim 2
Dependent Claim
100 words
A COMPOSITION EFFECTIVE IN COMBATING CORROSION OF FERRUGINOUS MATERIALS CONSISTING ESSENTIALLY OF A MIXTURE OF (A) FROM 25 TO 65 PER CENT BY WEIGHT OF AT LEAST ONE QUATERNARY AMMONIUM HALIDE WHEREIN ALL OF THE ORGANIC SUBSTITUENTS ARE HYDROCARBON RADICALS CONTAINING UP TO 18 CARBON ATOMS, AT LEAST ONE OF SUCH RADICALS BEING AN ALIPHATIC HYDROCARBON RADICAL CONTAINING FROM 8 TO 18 CARBON ATOMS AND EACH OF TWO OF SUCH RADICALS BEING LOWER ALKYL RADICALS HAVING FROM 1 TO 3 CARBON ATOMS; (B) FROM 2 TO 30 PER CENT BY WEIGHT OF AT LEAST ONE AMINE HAVING THE GENERAL FORMULA:
References Cited (Backward Citations)
US2564753A
Cited
US2659693A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-05-15 | 1959-11-14 | 1960-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-05-15 | 1963-11-14 | 1964-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-05-15 | 1967-11-14 | 1968-05-15 | $7700.00 | Window Closed / Lapsed |