US3712862A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well treating fluid and methods
Assignee: Champion Chemicals Inc
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Filing: 1970-10-16
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Granted: 1973-01-23
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Expires: 1990-10-16
Abstract
Abstract A WEIGHTED LIQUID CORROSION INHIBITING FORMULATION FOR USE IN OIL WELLS CONTAINING A WATER INSOLUBLE ORGANIC IRON CORROSION INHIBITOR, AN AQUEOUS SOLUTION OF A WATER SOLUBLE WEIGHTING AGENT AND A COUPLING AGENT SUCH AS A LOWER ALCOHOL. THE SOLUBLE WEIGTHING AGENT MAY BE, FOR EXAMPLE, AN AMMONIUM SALT, PHOSPHORIC ACID, A POLYOL, SUGAR, OR CERTAIN ORGANIC ACIDS.
Inventors
- 👤 C Bundrant
- 👤 C Hainebach
- 👤 F Mayo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:43
CPC Classifications
E; E21; E21B; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S507/00; Y10S507/939
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) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |