US2956889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition
Assignee: Dearborn Chemical Co
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Filing: 1956-02-06
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Granted: 1960-10-18
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Expires: 1976-02-06
Abstract
No abstract record available.
Inventors
- 👤 Wayne L Denman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:55
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/141
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
55 words
A WATER TREATING COMPOSITION, CONSISTING ESSENTIALLY OF AN AQUEOUS ALIPHATIC AMINE EMULSION CONTAINING A WATER-SOLUBLE CONDENSATE OF AT LEAST 5 MOLS OF ETHYLENE OXIDE WITH AN ALIPHATIC AMINE, AS AN EMULSIFYING AGENT, WHEREIN EACH ALIPHATIC RADICALS IS A C12-C20 HYDROCARBON RADICAL, THE WEIGHT RADIO OF THE AMINE TO THE CONDENSATE RANGING FROM 1:1 TO 20:1.
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) | 1963-10-18 | 1964-04-18 | 1964-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-10-18 | 1968-04-18 | 1968-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-10-18 | 1972-04-18 | 1972-10-18 | $7700.00 | Window Closed / Lapsed |