US3180418A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Casing descaling method and apparatus
Assignee: Individual
•
Filing: 1961-08-16
•
Granted: 1965-04-27
•
Expires: 1981-08-16
Abstract
No abstract record available.
Inventors
- 👤 Norman A Macleod
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:08
CPC Classifications
E; E21; E21B; E21B37/00; Y; Y10; Y10S; Y10S166/00; Y10S166/902
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
54 words
THE METHOD OF DESCALING A CASING CONTAINING A LIQUID INCLUDING: INTRODUCING AN ELECTRICALLY CONDUCTIVE CABLE INTO THE LIQUID IN THE VICINITY OF THE CASING, AND APPLYING AN ELECTRIC POTENTIAL TO THE CABLE TO PRODUCE AN ELECTRIC SPARK DISCHARGE IN THE VICINITY OF THE CASING AND THEREBY SET UP DESCALING SHOCK WAVES IN THE LIQUID.
Claim 2
Independent Claim
54 words
THE METHOD OF DESCALING A CASING CONTAINING A LIQUID INCLUDING: INTRODUCING AN ELECTRICALLY CONDUCTIVE CABLE INTO THE LIQUID IN THE VICINITY OF THE CASING, AND APPLYING AN ELECTRIC POTENTIAL TO THE CABLE TO PRODUCE AN ELECTRIC SPARK DISCHARGE IN THE VICINITY OF THE CASING AND THEREBY SET UP DESCALING SHOCK WAVES IN THE LIQUID.
Claim 3
Dependent Claim
115 words
APPARATUS FOR DESCALING A CASING CONTAINING A LIQUID INCLUDING: AN ELECTRICALLY CONDUCTIVE CABLE ADAPTED TO EXTEND DOWN INTO THE LIQUID IN THE VICINITY OF THE CASING, SAID CABLE HAVING AN INSULATING SHEATH AND HAVING AN INLET ELECTRICAL CONDUCTOR WITH THE LOWER EXTREMITY THEREOF PROTRUDING THROUGH THE LOWER END OF SAID SHEATH, MEANS FOR APPLYING A POTENTIAL TO SAID INNER CONDUCTOR TO PRODUCE AN ELECTRIC SPARK DISCHARGE AT THE LOWER EXTREMITY THEREOF IN THE VICINITY OF THE CASING AND THEREBY SET UP DESCALING SHOCK WAVES IN THE LIQUID AND WHICH INCLUDES MEANS FOR INTRODUCING ELECTRICALLY CONDUCTIVE PARTICLES INTO THE LIQUID IN THE VICINITY OF THE ELECTRIC SPARK DISCHARGE TO FACILITATE THE INITIATION OF THE SPARK DISHARGE.
Claim 4
Dependent Claim
115 words
APPARATUS FOR DESCALING A CASING CONTAINING A LIQUID INCLUDING: AN ELECTRICALLY CONDUCTIVE CABLE ADAPTED TO EXTEND DOWN INTO THE LIQUID IN THE VICINITY OF THE CASING, SAID CABLE HAVING AN INSULATING SHEATH AND HAVING AN INLET ELECTRICAL CONDUCTOR WITH THE LOWER EXTREMITY THEREOF PROTRUDING THROUGH THE LOWER END OF SAID SHEATH, MEANS FOR APPLYING A POTENTIAL TO SAID INNER CONDUCTOR TO PRODUCE AN ELECTRIC SPARK DISCHARGE AT THE LOWER EXTREMITY THEREOF IN THE VICINITY OF THE CASING AND THEREBY SET UP DESCALING SHOCK WAVES IN THE LIQUID AND WHICH INCLUDES MEANS FOR INTRODUCING ELECTRICALLY CONDUCTIVE PARTICLES INTO THE LIQUID IN THE VICINITY OF THE ELECTRIC SPARK DISCHARGE TO FACILITATE THE INITIATION OF THE SPARK DISHARGE.
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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) | 1968-04-26 | 1968-10-26 | 1969-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-26 | 1972-10-26 | 1973-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-26 | 1976-10-26 | 1977-04-27 | $7700.00 | Window Closed / Lapsed |