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US3553101A
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Prevention of corrosion using heterocyclic nitrogen compounds
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1968-05-17
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Granted: 1971-01-05
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Expires: 1988-05-17
Abstract
Abstract CORROSION OF METALS BY AQUEOUS ACIDIC SOLUTIONS IS MARKEDLY INHIBITED BY THE PRESENCE OF A HETEROCYCLIC NITROGEN COMPOUND HAVING A 5-MEMBER RING CONTAINING 2 OR 3 NITROGEN ATOMS. TYPICAL COMPOUNDS ARE PYRAZOLE AND 1,2, 4-TRIAZOLE. CORROSION OF CHEMICAL AND PETROLEUM PROCESS EQUIPMENT HANDLING HYDROCARBON AND OTHER CHEMICAL STREAMS CONTAINING ACIDIC SUBSTANCES IS MINIMIZED BY THE PRESENCE OF A CORROSION INHIBITOR OF THIS INVENTION.
Inventors
- 👤 Zisis Andrew Foroulis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:24
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |