US2846440A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Composition for and method of inhibiting corrosion of metals
Assignee: CITICS SERVICE RES AND DEV COM
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Filing: 1955-12-12
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Granted: 1958-08-05
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Expires: 1975-12-12
Abstract
No abstract record available.
Inventors
- 👤 William B Hughes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:33
CPC Classifications
C; C07; C07D; C07D233/00; C07D233/04; C07D233/06; C07D233/08; C07D233/12; C07D233/16; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/14; C23F11/149; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
AS A NEW COMPOSITION OF MATTER, THE COMPOUND PREPARED BY FIRST CONDENSING ONE MOL OF A POLYETHYLENEAMINE SELECTED FROM THE GROUP CONSISTING OF TRIETHYLENE TETRAMINE AND TETRAETHYLENE PENTAMINE WITH ONE MOL OF A MONOCARBOXYLIC ACID HAVING FROM 2 TO ABOUT 20 CARBON ATOMS BY REMOVING TWO MOLS OF WATER FROM THE REACTION MIXTURE BY DISTILLATION TO PROVIDE ON INTERMEDIATE IMIDAZOLINE REACTION PRODUCT, CONDENSING SAID INTERMEDIATE IMIDAZOLINE REACTION PRODUCT WITH ONE MOL OF AN ALDEHYDE HAVING FROM 1 TO ABOUT 15 CARBON ATOMS BY REMOVING 1 MOL OF WATER FROM THE REACTION MIXTURE BY DISTILLATION TO PROVIDE AN INTERMEDIATE IMIDAZOLINE-IMIDAZOLIDINE REACTION PRODUCT HAVING THE FORMULA
Claim 2
Dependent Claim
104 words
AS A NEW COMPOSITION OF MATTER, THE COMPOUND PREPARED BY FIRST CONDENSING ONE MOL OF A POLYETHYLENEAMINE SELECTED FROM THE GROUP CONSISTING OF TRIETHYLENE TETRAMINE AND TETRAETHYLENE PENTAMINE WITH ONE MOL OF A MONOCARBOXYLIC ACID HAVING FROM 2 TO ABOUT 20 CARBON ATOMS BY REMOVING TWO MOLS OF WATER FROM THE REACTION MIXTURE BY DISTILLATION TO PROVIDE ON INTERMEDIATE IMIDAZOLINE REACTION PRODUCT, CONDENSING SAID INTERMEDIATE IMIDAZOLINE REACTION PRODUCT WITH ONE MOL OF AN ALDEHYDE HAVING FROM 1 TO ABOUT 15 CARBON ATOMS BY REMOVING 1 MOL OF WATER FROM THE REACTION MIXTURE BY DISTILLATION TO PROVIDE AN INTERMEDIATE IMIDAZOLINE-IMIDAZOLIDINE REACTION PRODUCT HAVING THE FORMULA
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) | 1961-08-04 | 1962-02-03 | 1962-08-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-04 | 1966-02-03 | 1966-08-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-04 | 1970-02-03 | 1970-08-05 | $7700.00 | Window Closed / Lapsed |