US2602779A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inhibiting hydrogen sulfide corrosion of metals
Assignee: Cities Service Oil Co
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Filing: 1949-05-10
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Granted: 1952-07-08
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Expires: 1969-05-10
Abstract
No abstract record available.
Inventors
- 👤 Melvin I Moyer
- 👤 Joseph M Hersh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:19
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/162; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/932; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
THE PROCESS OF PREVENTING CORROSION OF METALS EXPOSED TO OIL WELL BRINES CONTAINING CORROSIVE SULFUR COMPOUNDS WHICH COMPRISES INTRODUCING INTO THE BRINE, AT THE WELL BOTTOM, A SMALL PROPORTION OF DIETHYL THIOUREA, AND THEREAFTER CAUSING THE BRINE CONTAINING THE DIETHYL THIOUREA TO FLOW IN CONTACT WITH THE METAL SURFACES TO BE PROTECTED.
Claim 2
Dependent Claim
52 words
THE PROCESS OF PREVENTING CORROSION OF METALS EXPOSED TO OIL WELL BRINES CONTAINING CORROSIVE SULFUR COMPOUNDS WHICH COMPRISES INTRODUCING INTO THE BRINE, AT THE WELL BOTTOM, A SMALL PROPORTION OF DIETHYL THIOUREA, AND THEREAFTER CAUSING THE BRINE CONTAINING THE DIETHYL THIOUREA TO FLOW IN CONTACT WITH THE METAL SURFACES TO BE PROTECTED.
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) | 1955-07-08 | 1956-01-07 | 1956-07-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-08 | 1960-01-07 | 1960-07-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-08 | 1964-01-07 | 1964-07-08 | $7700.00 | Window Closed / Lapsed |