US2981334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Consolidating plastic coated particulate solids
Assignee: Dow Chemical Co
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Filing: 1958-10-13
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Granted: 1961-04-25
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Expires: 1978-10-13
Abstract
No abstract record available.
Inventors
- 👤 Jr Hobart W Powell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:19
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/02; E21B43/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
A COMPOSITION FOR ADMIXTURE WITH AN ACID IN SITU TO PROVIDE A FLUID-PERMEABLE BARRIER IN AN OIL WELL CONSISTING OF (1) A RESIN-COATED PARTICULATE MATERIAL PREPARED BY HEATING A MIXTURE CONSISTING OF A PARTIALLY CONDENSED THERMOPLASTIC-THERMOSETTING RESIN AND A PARTICULATE MATERIAL INERT TO SAID RESIN HAVING A PARTICLE SIZE OF BETWEEN 10 AND 100 MESH AT A TEMPERATURE BETWEEN 120* AND 250*F. UNTIL A VISCOSITY OF BETWEEN 30 AND 40 CENTIPOISES AS MEASURED AT 200*F. IS ATTAINED, SLURRYING SAID ADMIXTURE WITH A PETROLEUM OIL AT A TEMPERATURE BETWEEN 180*F. AND 210*F. UNTIL THE RESIN FORMS A DRY, HARD COATING ON THE PARTICLES UPON BEING COOLED TO ROOM TEMPERATURE, (2) BETWEEN 3 AND 20 PERCENT BY WEIGHT OF SAID RESIN-COATED PARTICULATE COMPOSITION OF A 4 TO 100 MESH PARTICULATE METAL SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM, ZINC, AND ALUMINUM AND, (3) A FLUID VEHICLE SELECTED FROM THE CLASS CONSISTING OF PETROLEUM OIL AND WATER IN AN AMOUNT SUFFICIENT TO FORM A PUMPABLE SLURRY.
Claim 2
Dependent Claim
163 words
A COMPOSITION FOR ADMIXTURE WITH AN ACID IN SITU TO PROVIDE A FLUID-PERMEABLE BARRIER IN AN OIL WELL CONSISTING OF (1) A RESIN-COATED PARTICULATE MATERIAL PREPARED BY HEATING A MIXTURE CONSISTING OF A PARTIALLY CONDENSED THERMOPLASTIC-THERMOSETTING RESIN AND A PARTICULATE MATERIAL INERT TO SAID RESIN HAVING A PARTICLE SIZE OF BETWEEN 10 AND 100 MESH AT A TEMPERATURE BETWEEN 120* AND 250*F. UNTIL A VISCOSITY OF BETWEEN 30 AND 40 CENTIPOISES AS MEASURED AT 200*F. IS ATTAINED, SLURRYING SAID ADMIXTURE WITH A PETROLEUM OIL AT A TEMPERATURE BETWEEN 180*F. AND 210*F. UNTIL THE RESIN FORMS A DRY, HARD COATING ON THE PARTICLES UPON BEING COOLED TO ROOM TEMPERATURE, (2) BETWEEN 3 AND 20 PERCENT BY WEIGHT OF SAID RESIN-COATED PARTICULATE COMPOSITION OF A 4 TO 100 MESH PARTICULATE METAL SELECTED FROM THE CLASS CONSISTING OF MAGNESIUM, ZINC, AND ALUMINUM AND, (3) A FLUID VEHICLE SELECTED FROM THE CLASS CONSISTING OF PETROLEUM OIL AND WATER IN AN AMOUNT SUFFICIENT TO FORM A PUMPABLE SLURRY.
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) | 1964-04-24 | 1964-10-24 | 1965-04-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-24 | 1968-10-24 | 1969-04-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-24 | 1972-10-24 | 1973-04-25 | $7700.00 | Window Closed / Lapsed |