Patent US6235042B1 successfully refreshed from Google Patents.
US2869643A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Treatment of oil and gas wells
Assignee: JBS USA LLC
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Filing: 1957-03-25
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Granted: 1959-01-20
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Expires: 1977-03-25
Abstract
No abstract record available.
Inventors
- 👤 Albert G Schuessler
- 👤 Charles B Swain
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:37
CPC Classifications
C; C09; C09K; C09K8/00; C09K8/60; C09K8/62; C09K8/64; Y; Y10; Y10S; Y10S507/00; Y10S507/922
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
110 words
IN A METHOD OF IMPROVING THE PERMEABILITY OF OIL OR GAS BEARING SUBTERRANEAN FORMATIONS BY HYDRAULIC FRACTURE, THE IMPROVEMENT WHICH COMPRISES: SLOWLY FORCING INTO THE FORMATION A MINERAL OIL HAVING DISSOLVED THEREIN A COMPOSITION COMPRISING AN ALKALI SALT OF SULFATED SPERM OIL AS THE MAJOR ACTIVE INGREDIENT AND LEAD PETROLEUM SULFONATE AS A MINOR INGREDIENT; ALLOWING THE TREATING FLUID TO REMAIN IN CONTACT WITH THE FORMATION FOR A PERIOD OF TIME; REVERSING THE FLOW OF THE TREATING FLUID FOR REMOVAL OF WATER AS A LOW VISCOSITY WATER-IN-OIL EMULSION FROM THE FORMATION; PUMPING A FRACTURING FLUID INTO THE FORMATION; AND APPLYING PRESSURE TO SAID FRACTURING FLUID WHEREBY TO FRACTURE THE FORMATION.
Claim 2
Dependent Claim
110 words
IN A METHOD OF IMPROVING THE PERMEABILITY OF OIL OR GAS BEARING SUBTERRANEAN FORMATIONS BY HYDRAULIC FRACTURE, THE IMPROVEMENT WHICH COMPRISES: SLOWLY FORCING INTO THE FORMATION A MINERAL OIL HAVING DISSOLVED THEREIN A COMPOSITION COMPRISING AN ALKALI SALT OF SULFATED SPERM OIL AS THE MAJOR ACTIVE INGREDIENT AND LEAD PETROLEUM SULFONATE AS A MINOR INGREDIENT; ALLOWING THE TREATING FLUID TO REMAIN IN CONTACT WITH THE FORMATION FOR A PERIOD OF TIME; REVERSING THE FLOW OF THE TREATING FLUID FOR REMOVAL OF WATER AS A LOW VISCOSITY WATER-IN-OIL EMULSION FROM THE FORMATION; PUMPING A FRACTURING FLUID INTO THE FORMATION; AND APPLYING PRESSURE TO SAID FRACTURING FLUID WHEREBY TO FRACTURE THE FORMATION.
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) | 1962-01-19 | 1962-07-21 | 1963-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-01-19 | 1966-07-21 | 1967-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-01-19 | 1970-07-21 | 1971-01-20 | $7700.00 | Window Closed / Lapsed |