US3199585A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Well treating method
Assignee: Dow Chemical Co
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Filing: 1963-03-13
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Granted: 1965-08-10
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Expires: 1983-03-13
Abstract
No abstract record available.
Inventors
- 👤 Luther C Cronberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:29
CPC Classifications
E; E21; E21B; E21B17/00; E21B41/00; E21B41/02; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
A METHOD OF DEPOSITING A PROTECTIVE COATING ON THE OUTER SURFACE OF A TUBULAR MEMBER DISPOSED IN THE BORE OF AN EARTH WELL COMPRISING CONNECTING SAID TUBULAR MEMBER TO A SOURCE OF ELECTRICAL POTENTIAL SUCH THAT SAID TUBULAR MEMBER CONSTITUTES A FIRST ELECTRODE, CONNECTING A SECOND ELECTRODE SPACED FROM SAID TUBULAR MEMBER AND CONTACTING THE EARTH TO SAID SOURCE OF ELECTRICAL POTENTIAL, DISPOSING AN ELECTRO-PLATABLE DISPERSION CONTAINING SOLIDS BETWEEN SAID OUTER SURFACE AND SAID WELL BORE AND THEN APPLYING AN ELECTRIC CURRENT OF PREDETERMINED POLARIZATION BETWEEN SAID FIRST ELECTRODE AND SAID SECOND ELECTRODE WHEREBY CURRENT PASSES THROUGH SAID DISPERSION TO DEPOSIT SOLIDS FROM SAID DISPERSION ONTO SAID SURFACE, THE POLARIZATION OF THE CHARGE ON SAID TUBULAR MEMBER BEING OPPOSITE THAT OF SOLIDS IN SAID DISPERSION.
Claim 2
Independent Claim
125 words
A METHOD OF DEPOSITING A PROTECTIVE COATING ON THE OUTER SURFACE OF A TUBULAR MEMBER DISPOSED IN THE BORE OF AN EARTH WELL COMPRISING CONNECTING SAID TUBULAR MEMBER TO A SOURCE OF ELECTRICAL POTENTIAL SUCH THAT SAID TUBULAR MEMBER CONSTITUTES A FIRST ELECTRODE, CONNECTING A SECOND ELECTRODE SPACED FROM SAID TUBULAR MEMBER AND CONTACTING THE EARTH TO SAID SOURCE OF ELECTRICAL POTENTIAL, DISPOSING AN ELECTRO-PLATABLE DISPERSION CONTAINING SOLIDS BETWEEN SAID OUTER SURFACE AND SAID WELL BORE AND THEN APPLYING AN ELECTRIC CURRENT OF PREDETERMINED POLARIZATION BETWEEN SAID FIRST ELECTRODE AND SAID SECOND ELECTRODE WHEREBY CURRENT PASSES THROUGH SAID DISPERSION TO DEPOSIT SOLIDS FROM SAID DISPERSION ONTO SAID SURFACE, THE POLARIZATION OF THE CHARGE ON SAID TUBULAR MEMBER BEING OPPOSITE THAT OF SOLIDS IN SAID DISPERSION.
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) | 1968-08-09 | 1969-02-08 | 1969-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-08-09 | 1973-02-08 | 1973-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-08-09 | 1977-02-08 | 1977-08-10 | $7700.00 | Window Closed / Lapsed |