US3243379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Corrosion inhibitor for hot acids
Assignee: Pan American Petroleum Corp
•
Filing: 1963-08-02
•
Granted: 1966-03-29
•
Expires: 1983-08-02
Abstract
No abstract record available.
Inventors
- 👤 Jr Edwin E Claytor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:15
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/54; C23; C23F; C23F11/00; C23F11/04; C23G; C23G1/00; C23G1/02; C23G1/04; C23G1/06; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
121 words
A CORROSION INHIBITED AQUEOUS ACID SOLUTION FOR USE IN CONTACT WITH SURFACES AT TEMPERATURES FROM ABOUT 200*F., TO ABOUT 350*F. COMPRISING WATER, HYDROCHLORIC ACID, POLYGLYCIDYL 4,4-BIS (4-HYDROXY PHENYL) PENTANOIC ACID AND A PRIMARY AMINE HAVING FROM ABOUT 12 TO ABOUT 30 CARBON ATOMS PER MOLECULE, THE WEIGHT RATIO OF SAID POLYGLYCIDYL ACID TO SAD AMINE BEING BETWEEN ABOUT 1 TO 1 AND ABOUT 3 TO 1 AND SAID POLYGLYCIDYL ACID BEING PREPARED BY REACTING EPICHLOROHYDRIN AND 4,4-BIS (4-HYDROXY PHENYL) PENTANOIC ACID IN A MOLAR RATIO FROM ABOUT 1.5 TO 1 TO ABOUT 6 TO 1, AND THE CONCENTRATION OF THE COMBINATION OF AMINE AND POLYGLYCIDYL ACID BEING FROM ABOUT 0.1 TO ABOUT 5 PERCENT BY WEIGHT OF THE AQUEOUS ACID SOLUTION.
Claim 2
Dependent Claim
121 words
A CORROSION INHIBITED AQUEOUS ACID SOLUTION FOR USE IN CONTACT WITH SURFACES AT TEMPERATURES FROM ABOUT 200*F., TO ABOUT 350*F. COMPRISING WATER, HYDROCHLORIC ACID, POLYGLYCIDYL 4,4-BIS (4-HYDROXY PHENYL) PENTANOIC ACID AND A PRIMARY AMINE HAVING FROM ABOUT 12 TO ABOUT 30 CARBON ATOMS PER MOLECULE, THE WEIGHT RATIO OF SAID POLYGLYCIDYL ACID TO SAD AMINE BEING BETWEEN ABOUT 1 TO 1 AND ABOUT 3 TO 1 AND SAID POLYGLYCIDYL ACID BEING PREPARED BY REACTING EPICHLOROHYDRIN AND 4,4-BIS (4-HYDROXY PHENYL) PENTANOIC ACID IN A MOLAR RATIO FROM ABOUT 1.5 TO 1 TO ABOUT 6 TO 1, AND THE CONCENTRATION OF THE COMBINATION OF AMINE AND POLYGLYCIDYL ACID BEING FROM ABOUT 0.1 TO ABOUT 5 PERCENT BY WEIGHT OF THE AQUEOUS ACID SOLUTION.
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) | 1969-03-28 | 1969-09-27 | 1970-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-28 | 1973-09-27 | 1974-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-28 | 1977-09-27 | 1978-03-29 | $7700.00 | Window Closed / Lapsed |