Patent US1256433A successfully refreshed from Google Patents.
Patent US2593057A successfully refreshed from Google Patents.
US2593057A
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Inhibitors against hydrogen sulfide and brine corrosion
Assignee: Pure Oil Co
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Filing: 1949-12-29
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Granted: 1952-04-15
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Expires: 1969-12-29
Abstract
No abstract record available.
Inventors
- 👤 Michael G Savoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:41
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/122; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/932; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
THE METHOD OF PROTECTING STEEL SURFACES IN OIL WELLS AGAINST HYDROGEN SULFIDE AND BRINE CORROSION COMPRISING CONTINUALLY INTRODUCING IN SAID WELLS DURING THE PRODUCTION OF OIL AND BRINE THEREFROM, COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF CELLULOSE SULFATE AND ALKALI METAL SALTS OF CARBOXYMETHYL CELLULOSE IN AN AMOUNT OF ABOUT 1 PART OF SAID COMPOUNDS PER 1,000 TO 10,000 PARTS OF BRINE PRODUCED FROM THE WELL, SO THAT SAID COMPOUNDS BECOME MIXED WITH SAID OIL AND BRINE IN CONTACT WITH SAID SURFACES AND WITHDRAWING OIL AND BRINE FROM THE WELL MIXED WITH SAID COMPOUNDS.
Claim 2
Independent Claim
94 words
THE METHOD OF PROTECTING STEEL SURFACES IN OIL WELLS AGAINST HYDROGEN SULFIDE AND BRINE CORROSION COMPRISING CONTINUALLY INTRODUCING IN SAID WELLS DURING THE PRODUCTION OF OIL AND BRINE THEREFROM, COMPOUNDS SELECTED FROM THE GROUP CONSISTING OF CELLULOSE SULFATE AND ALKALI METAL SALTS OF CARBOXYMETHYL CELLULOSE IN AN AMOUNT OF ABOUT 1 PART OF SAID COMPOUNDS PER 1,000 TO 10,000 PARTS OF BRINE PRODUCED FROM THE WELL, SO THAT SAID COMPOUNDS BECOME MIXED WITH SAID OIL AND BRINE IN CONTACT WITH SAID SURFACES AND WITHDRAWING OIL AND BRINE FROM THE WELL MIXED WITH SAID COMPOUNDS.
References Cited (Backward Citations)
US2425768A
Cited
US2472400A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-04-15 | 1955-10-15 | 1956-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-04-15 | 1959-10-15 | 1960-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-04-15 | 1963-10-15 | 1964-04-15 | $7700.00 | Window Closed / Lapsed |