US3669613A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for inhibiting sulfide cracking of metals with a hydrogen sulfide-aldehyde reaction product
Assignee: Halliburton Co
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Filing: 1970-04-27
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Granted: 1972-06-13
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Expires: 1990-04-27
Abstract
Abstract INHIBITION OF HYDROGEN SULFIDE CRACKING IN FERROUS METALS IS GAINED THROUGH THE USE OF THE REACTION PRODUCT OF AN ALDEHYDE AND HYDROGEN SULFIDE PREPARED IN THE PRESENCE OF AN ACID WHEREIN THE REACTION PRODUCT MAY BE FORMED IN SITU, ADDED TO A HYDROGEN SULFIDE CONTAINING ENVIRONMENT OR COATED ON A FERROUS METAL BEFORE IT IS EXPOSED TO SUCH AN ENVIRONMENT.
Inventors
- 👤 John A Knox
- 👤 Bill R Keeney
- 👤 Reginald M Lasater
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 01:05
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; Y; Y10; Y10S; Y10S507/00; Y10S507/933; Y10S507/934; Y10S507/939
Claims Analysis
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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) | 1975-06-13 | 1975-12-13 | 1976-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-13 | 1979-12-13 | 1980-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-13 | 1983-12-13 | 1984-06-13 | $7700.00 | Window Closed / Lapsed |