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US3170519A
Expired / Lapsed
US
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Oil well microwave tools
Assignee: Individual
•
Filing: 1960-05-11
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Granted: 1965-02-23
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Expires: 1980-05-11
Abstract
No abstract record available.
Inventors
- 👤 Duane B Haagensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:05
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/04; H; H05; H05B; H05B6/00; H05B6/64; H05B6/80; H05B2214/00; H05B2214/03
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
AN APPARATUS FOR HEATING A PETROLEUM-BEARING FORMATION AND ADAPTED TO BE CONNECTED TO THHE LOWER EXTREMITY OF A PRODUCING STRING AT A POSITION OPPOSITE SAID FORMATION, SAID APPARATUS COMPRISING A CAPSULE HAVING FIRST AND SECOND PORTIONS, SAID FIRST PORTION OF SAID CAPSULE CONTAINING A PLURALITY OF ELECTRICAL DEVICES MOUNTED THEREIN FOR SIMULTANEOUSLY GENERATING MICROWAVE ENERGY AND THERMAL ENERGY, MEANS FOR SUPPLYING EXCITATION VOLTAGES TO SAID DEVICES, MEANS FOR DIRECTING SAID MICROWAVE ENERGY AT A FREQUENCY OF BETWEEN 1000 AND 300,000 MEGACYCLES INTO SAID PETROLEUM-BEARING FORMATION, SAID SECOND PORTION OF SAID CAPSULE HAVING PERORATIONS THEREIN FOR ALLOWING PETROLEUM PRODUCTS TO ENTER SAID PRODUCING STRING, MEANS FOR CONNECTING SAID CAPSULE TO SAID PRODUCING STRING, SAID SECOND CAPSULE PORTION INCLUDING A HEAT
Claim 2
Independent Claim
119 words
AN APPARATUS FOR HEATING A PETROLEUM-BEARING FORMATION AND ADAPTED TO BE CONNECTED TO THHE LOWER EXTREMITY OF A PRODUCING STRING AT A POSITION OPPOSITE SAID FORMATION, SAID APPARATUS COMPRISING A CAPSULE HAVING FIRST AND SECOND PORTIONS, SAID FIRST PORTION OF SAID CAPSULE CONTAINING A PLURALITY OF ELECTRICAL DEVICES MOUNTED THEREIN FOR SIMULTANEOUSLY GENERATING MICROWAVE ENERGY AND THERMAL ENERGY, MEANS FOR SUPPLYING EXCITATION VOLTAGES TO SAID DEVICES, MEANS FOR DIRECTING SAID MICROWAVE ENERGY AT A FREQUENCY OF BETWEEN 1000 AND 300,000 MEGACYCLES INTO SAID PETROLEUM-BEARING FORMATION, SAID SECOND PORTION OF SAID CAPSULE HAVING PERORATIONS THEREIN FOR ALLOWING PETROLEUM PRODUCTS TO ENTER SAID PRODUCING STRING, MEANS FOR CONNECTING SAID CAPSULE TO SAID PRODUCING STRING, SAID SECOND CAPSULE PORTION INCLUDING A HEAT
References Cited (Backward Citations)
US1169262A
Cited
US1291302A
Cited
US1457479A
Cited
US2186035A
Cited
US2455942A
Cited
US2455941A
Cited
US2685930A
Cited
US2757738A
Cited
US2585970A
Cited
US2632868A
Cited
US2742967A
Cited
US2816735A
Cited
US2911047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-23 | 1968-08-24 | 1969-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-23 | 1972-08-24 | 1973-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-23 | 1976-08-24 | 1977-02-23 | $7700.00 | Window Closed / Lapsed |