US2640809A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prevention of corrosion
Assignee: SOGC Inc
•
Filing: 1950-12-19
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Granted: 1953-06-02
•
Expires: 1970-12-19
Abstract
No abstract record available.
Inventors
- 👤 Nelson John Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:17
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/12; C23F11/124; C23F11/126; Y; Y10; Y10S; Y10S507/00; Y10S507/939
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
89 words
IN THE PRODUCTION OF OIL FROM WELLS, THE STEP OF INTRODUCING INTO THE WELL FLUID 0.2 TO 2.0 PINTS, CALCULATED ON THE OIL FREE BASIS, PER 1000 BARRELS OF WELL FLUID, OF A MIXTURE OF HIGH MOLECULAR WEIGHT WAX ACIDS PRODUCED BY SUBSTANTIALLY COMPLETE OXIDATION OF MICROCRYSTALLINE WAX CONTAINING 3455 CARBON ATOMS PER MOLECULE, WHICH MIXTURE IS CHARACTERIZED BY EXTREME WATER INSOLUBILITY AND BY A SAPONIFICATION NUMBER LESS THAN ABOUT 200, AND WHICH MIXTURE PREDOMINATES IN MONOCARBOXYLIC ACIDS HAVING AN APPARENT CHAIN LENGTH EXCEEDING 18 CARBON ATOMS PER MOLECULE.
Claim 2
Dependent Claim
89 words
IN THE PRODUCTION OF OIL FROM WELLS, THE STEP OF INTRODUCING INTO THE WELL FLUID 0.2 TO 2.0 PINTS, CALCULATED ON THE OIL FREE BASIS, PER 1000 BARRELS OF WELL FLUID, OF A MIXTURE OF HIGH MOLECULAR WEIGHT WAX ACIDS PRODUCED BY SUBSTANTIALLY COMPLETE OXIDATION OF MICROCRYSTALLINE WAX CONTAINING 3455 CARBON ATOMS PER MOLECULE, WHICH MIXTURE IS CHARACTERIZED BY EXTREME WATER INSOLUBILITY AND BY A SAPONIFICATION NUMBER LESS THAN ABOUT 200, AND WHICH MIXTURE PREDOMINATES IN MONOCARBOXYLIC ACIDS HAVING AN APPARENT CHAIN LENGTH EXCEEDING 18 CARBON ATOMS PER MOLECULE.
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) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |