Patent US2914476A successfully refreshed from Google Patents.
US2914476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thickened petroleum liquid especially for treating wells
Assignee: Dow Chemical Co
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Filing: 1957-04-30
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Granted: 1959-11-24
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Expires: 1977-04-30
Abstract
No abstract record available.
Inventors
- 👤 Edwin N Alderman
- 👤 Elmer I Spearman
- 👤 Caleb M Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 19:13
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64; Y; Y10; Y10S; Y10S507/00; Y10S507/921; Y10S516/00; Y10S516/924; Y10S516/927
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
THE METHOD OF INCREASING THE VICOSITY OF A PETROLEUM LIQUID WHICH COMPRISES REACTING TOGETHER IN ADMIXTURE WITH THE PETROLEUM LIQUID A MIXUTE OF ACIDS, SAID MIXTURE CONSISTING OF TALL OIL AND A STRAIGHT CHAIN ALIPHATIC ORGANIC ACID HAVING FROM SIX TO TEN CARBON ATOMS IN THE CHAIN, AND A SUFFICIENT QUANTITY OF AN ALKALI METAL HYDROXIDE TO AT LEAST APPROXIMATELY NEUTRALIZE THE ACIDS OF THE SAID MIXTURE, THE AMOUNT OF THE ALIPHATIC ORGANIC ACID BEING FROM 10 TO 25 PERCENT OF THAT OF THE TALL OIL BY WEIGHT AND THE AMOUNT OF THE MIXTURE OF ACIDS BEING FROM 0.75 TO 3 PERCENT OF THE WEIGHT OF THE PETROLEUM LIQUID.
Claim 2
Independent Claim
109 words
THE METHOD OF INCREASING THE VICOSITY OF A PETROLEUM LIQUID WHICH COMPRISES REACTING TOGETHER IN ADMIXTURE WITH THE PETROLEUM LIQUID A MIXUTE OF ACIDS, SAID MIXTURE CONSISTING OF TALL OIL AND A STRAIGHT CHAIN ALIPHATIC ORGANIC ACID HAVING FROM SIX TO TEN CARBON ATOMS IN THE CHAIN, AND A SUFFICIENT QUANTITY OF AN ALKALI METAL HYDROXIDE TO AT LEAST APPROXIMATELY NEUTRALIZE THE ACIDS OF THE SAID MIXTURE, THE AMOUNT OF THE ALIPHATIC ORGANIC ACID BEING FROM 10 TO 25 PERCENT OF THAT OF THE TALL OIL BY WEIGHT AND THE AMOUNT OF THE MIXTURE OF ACIDS BEING FROM 0.75 TO 3 PERCENT OF THE WEIGHT OF THE PETROLEUM LIQUID.
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) | 1962-11-23 | 1963-05-25 | 1963-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-11-23 | 1967-05-25 | 1967-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-11-23 | 1971-05-25 | 1971-11-24 | $7700.00 | Window Closed / Lapsed |