Patent US4404369A successfully refreshed from Google Patents.
Patent US2708876A successfully refreshed from Google Patents.
US2708876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ring detonation process for increasing productivity of oil wells
Assignee: Union Oil Company of California
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Filing: 1950-10-17
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Granted: 1955-05-24
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Expires: 1970-10-17
Abstract
No abstract record available.
Inventors
- 👤 Theodore J Nowak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:20
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/263; C; C09; C09K; C09K8/00; C09K8/60; F; F42; F42D; F42D1/00; F42D1/08; F42D1/10; F42D1/24; F42D1/28; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49805; Y10T29/49806
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
THE METHOD OF PRODUCING AN EXPLOSION WITHIN A SUBTERRANEAN FORMATION PENETRATED BY A WELL BORE WHICH COMPRISES INTRODUCING INTO SAID BORE A FIRST PORTION OF LIQUID EXPLOSIVE, APPLYING PRESSURE TO SIAD LIQUID EXPLOSIVE TO FORCE SAID EXPLOSIVE INTO SAID FORMATION SO AS TO FORM A CIRCUMSCRIBING RING OF EXPLOSIVE ABOUT THE BORE, FORCING AN INERT PERMEATIVE LIQUID INTO SAID FORMATION, INTRODUCING AN SECOND PORTION OF LIQUID EXPLOSIVE INTO SAID BORE HOLE, APPLYING PRESSURE TO SAID SECOND PORTION OF EXPLOSIVE TO FORCE THE SAME INTO SIAD FORMATION, PACKING AN INERT PERMEATIVE LIQUID INTO SAID FORMATION, PACKING THE BORE WITH A SOAP-THICKENED MINERAL OIL COMPOSITION,
Claim 2
Independent Claim
103 words
THE METHOD OF PRODUCING AN EXPLOSION WITHIN A SUBTERRANEAN FORMATION PENETRATED BY A WELL BORE WHICH COMPRISES INTRODUCING INTO SAID BORE A FIRST PORTION OF LIQUID EXPLOSIVE, APPLYING PRESSURE TO SIAD LIQUID EXPLOSIVE TO FORCE SAID EXPLOSIVE INTO SAID FORMATION SO AS TO FORM A CIRCUMSCRIBING RING OF EXPLOSIVE ABOUT THE BORE, FORCING AN INERT PERMEATIVE LIQUID INTO SAID FORMATION, INTRODUCING AN SECOND PORTION OF LIQUID EXPLOSIVE INTO SAID BORE HOLE, APPLYING PRESSURE TO SAID SECOND PORTION OF EXPLOSIVE TO FORCE THE SAME INTO SIAD FORMATION, PACKING AN INERT PERMEATIVE LIQUID INTO SAID FORMATION, PACKING THE BORE WITH A SOAP-THICKENED MINERAL OIL COMPOSITION,
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) | 1958-05-23 | 1958-11-22 | 1959-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-05-23 | 1962-11-22 | 1963-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-05-23 | 1966-11-22 | 1967-05-24 | $7700.00 | Window Closed / Lapsed |