US2970958A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of dissolving asphaltene deposits
Assignee: ExxonMobil Oil Corp
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Filing: 1956-10-01
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Granted: 1961-02-07
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Expires: 1976-10-01
Abstract
No abstract record available.
Inventors
- 👤 Shapiro Abraham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:49
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/93
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
60 words
A PROCESS OF REMMOVING FROM OIL AND GAS WELLS AND FROM PETROLEUM PIPE LINES DEPOSITS WHICH INCLUDE ASPHALTENES AND WHICH ARE SUNBSTANTIALLY DEVOID OF READILY PETROLEUM-SOLUBLE MATERIALS, COMPRISES: EXPOSING SAID DEPOSITS TO THE SOLVENT ACTION OF A MIXTURE INCLUDING A LIQUID-SULFUR-DIOXIDE EXTRACT FROM A PETROLEUM DISTILLATE AND ACETONE, SAID MIXTURE CONTAINING ABOUT FIVE TO FORTY PERCENT BY VOLUME F ACETONE.
Claim 2
Dependent Claim
60 words
A PROCESS OF REMMOVING FROM OIL AND GAS WELLS AND FROM PETROLEUM PIPE LINES DEPOSITS WHICH INCLUDE ASPHALTENES AND WHICH ARE SUNBSTANTIALLY DEVOID OF READILY PETROLEUM-SOLUBLE MATERIALS, COMPRISES: EXPOSING SAID DEPOSITS TO THE SOLVENT ACTION OF A MIXTURE INCLUDING A LIQUID-SULFUR-DIOXIDE EXTRACT FROM A PETROLEUM DISTILLATE AND ACETONE, SAID MIXTURE CONTAINING ABOUT FIVE TO FORTY PERCENT BY VOLUME F ACETONE.
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) | 1964-02-07 | 1964-08-08 | 1965-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-02-07 | 1968-08-08 | 1969-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-02-07 | 1972-08-08 | 1973-02-07 | $7700.00 | Window Closed / Lapsed |