Patent US2604947A successfully refreshed from Google Patents.
US2604947A
Expired / Lapsed
US
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Plugging agent and process
Assignee: Hercules Powder Co
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Filing: 1946-11-22
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Granted: 1952-07-29
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Expires: 1966-11-22
Abstract
No abstract record available.
Inventors
- 👤 Martin Don
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 15:55
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/50; C09K8/502
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
139 words
IN THE PROCESS OF SECONDARY OIL RECOVERY WHEREIN WATER IS FORCED INTO AN INPUT WELL TO ASSIST IN THE RECOVERY OF OIL FROM POROUS OIL SANDS ADJACENT THERETO, THE IMPROVEMENT COMPRISING SELECTIVELY PLUGGING WATERED-OUT SANDS BY ADDING TO THE INPUT WATER OF SAID INPUT WELL AN AQUEOUS EMULSION WHOSE DISPERSED PHASE IS PREDOMINANTLY A SUBSTANTIALLY GASOLINE-INSOLUBLE NATURAL RESIN, SAID NETURAL RESIN BEING OBTAINED AS A BYPRODUCT IN THE RECOVERY OF ROSIN FROM PINE WOOD AND HAVING THE FOLLOWING CHARACTERISTICS: A GASOLINE-INSOLUBILITY OF FROM 30% TO 95%, AN UNSAPONIFIABLE CONTENT OF FROM 5% TO 20%, A MELTING POINT ABOVE 85* C. AND AN ACID NUMBER OF NOT OVER 140, THE EMULSIFIED RESIN FORMING A HARD PETROLEUM- AND WATER-INSOLUBLE PLUG IN SAID OIL SAND WHICH IS EASILY REMOVABLE ON TREATMENT WITH ALKALI BY FORMING A COMPLETELY WATER-SOLUBLE SOAP WITH SAID RESIN.
Claim 2
Dependent Claim
139 words
IN THE PROCESS OF SECONDARY OIL RECOVERY WHEREIN WATER IS FORCED INTO AN INPUT WELL TO ASSIST IN THE RECOVERY OF OIL FROM POROUS OIL SANDS ADJACENT THERETO, THE IMPROVEMENT COMPRISING SELECTIVELY PLUGGING WATERED-OUT SANDS BY ADDING TO THE INPUT WATER OF SAID INPUT WELL AN AQUEOUS EMULSION WHOSE DISPERSED PHASE IS PREDOMINANTLY A SUBSTANTIALLY GASOLINE-INSOLUBLE NATURAL RESIN, SAID NETURAL RESIN BEING OBTAINED AS A BYPRODUCT IN THE RECOVERY OF ROSIN FROM PINE WOOD AND HAVING THE FOLLOWING CHARACTERISTICS: A GASOLINE-INSOLUBILITY OF FROM 30% TO 95%, AN UNSAPONIFIABLE CONTENT OF FROM 5% TO 20%, A MELTING POINT ABOVE 85* C. AND AN ACID NUMBER OF NOT OVER 140, THE EMULSIFIED RESIN FORMING A HARD PETROLEUM- AND WATER-INSOLUBLE PLUG IN SAID OIL SAND WHICH IS EASILY REMOVABLE ON TREATMENT WITH ALKALI BY FORMING A COMPLETELY WATER-SOLUBLE SOAP WITH SAID RESIN.
References Cited (Backward Citations)
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US2264037A
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US2176266A
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US2236987A
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US2434605A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-07-29 | 1956-01-28 | 1956-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-29 | 1960-01-28 | 1960-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-29 | 1964-01-28 | 1964-07-29 | $7700.00 | Window Closed / Lapsed |