Patent US3718586A successfully refreshed from Google Patents.
US3718586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solvent for cleaning well bores,flowlines,etc.
Assignee: Individual
•
Filing: 1971-12-02
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Granted: 1973-02-27
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Expires: 1991-12-02
Abstract
Abstract A SOLVENT IS PROVIDED FOR PARAFFIN, WAXY SLUDGES AND THE LIKE OF PETROLEUM ORIGIN. THE SOLVENT INCLUDES A LIQUID PETROLEUM GAS AND A COMPOSITION OF A NORMALLY LIQUID AROMATIC. WHEN THE LIQUID PETROLEUM GAS IS THEN COMBINED WITH NORMALLY LIQUID AROMATIC, INCREASED SOLVENT PROPERTIES ARE OBTAINED BY ADDITION OF A LIQUID PETROLEUM SULFONATE AS WELL AS A SURFACTANT AND ETHYLENE GLYCOL. THE QOLVENT MAY BE USED IN PROCESSES FOR CLEANING OIL AND GAS WELL BORES, FLOW LINES, TRANSMISSION LINES AND STORAGE TANKS.
Inventors
- 👤 W Rollo
- 👤 J Melancon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 00:56
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/52; C09K8/524; Y; Y10; Y10S; Y10S507/00; Y10S507/927; Y10S507/929; Y10S507/931
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |