US3345296A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibition
Assignee: FMC Corp
•
Filing: 1964-02-28
•
Granted: 1967-10-03
•
Expires: 1984-02-28
Abstract
No abstract record available.
Inventors
- 👤 Charles W Lutz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:29
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04; C23F11/08; C23F11/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
AQUEOUS PHOSPHORUS-CONTAINING SOLUTION, HAVING A HIGH DEGREE OF COMPATIBILITY AGAINST COMPONENT SEPARATION AND INHIBITED AGAINST CORROSION OF MILD STEEL, SAID AQUEOUS SOLUTION HAVING A PHOSPHORUS-CONTAINING INGREDIENT FROM THE GROUP CONSISTING OF CONCENTRATED PHOSPHORIC ACID AND AN AMMONIUM PHOSPHATE AND ESSENTIALLY CONTAINING AS THE PREDOMINATING INHIBITOR AGAINST SAID CORROSON 0.01 TO 100 P.P.M. OF ETHYLQUINOLINIUM IODIDE ON THE WEIGHT OF SAID SOLUTION AND 0.03 TO 0.20 PERCENT BY WEIGHT OF THE WEIGHT OF SAID SOLUTION OF A BASE INHIBITOR FROM THE GROUP CONSISTING OF: BASE INHIBITOR A, A MIXTURE OF 3:1 TO 1:3 PARTS BY WEIGHT RESPECTIVELY OF (A) A DI-LONG-CHAIN-ALKYL DIMETHYL AMMONIUM CHLORIDE IN WHICH THE ALKYL CHAINS HAVE 8 TO 18 CARBON ATOMS, AND (B) A ROSIN AMINE DERIVATIVE HAVING THE FORMULA
Claim 2
Dependent Claim
123 words
AQUEOUS PHOSPHORUS-CONTAINING SOLUTION, HAVING A HIGH DEGREE OF COMPATIBILITY AGAINST COMPONENT SEPARATION AND INHIBITED AGAINST CORROSION OF MILD STEEL, SAID AQUEOUS SOLUTION HAVING A PHOSPHORUS-CONTAINING INGREDIENT FROM THE GROUP CONSISTING OF CONCENTRATED PHOSPHORIC ACID AND AN AMMONIUM PHOSPHATE AND ESSENTIALLY CONTAINING AS THE PREDOMINATING INHIBITOR AGAINST SAID CORROSON 0.01 TO 100 P.P.M. OF ETHYLQUINOLINIUM IODIDE ON THE WEIGHT OF SAID SOLUTION AND 0.03 TO 0.20 PERCENT BY WEIGHT OF THE WEIGHT OF SAID SOLUTION OF A BASE INHIBITOR FROM THE GROUP CONSISTING OF: BASE INHIBITOR A, A MIXTURE OF 3:1 TO 1:3 PARTS BY WEIGHT RESPECTIVELY OF (A) A DI-LONG-CHAIN-ALKYL DIMETHYL AMMONIUM CHLORIDE IN WHICH THE ALKYL CHAINS HAVE 8 TO 18 CARBON ATOMS, AND (B) A ROSIN AMINE DERIVATIVE HAVING THE FORMULA
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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) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |