Patent EP0249821A1 successfully refreshed from Google Patents.
US3149673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of solid polyolefin propping agent in hydraulic fracturing
Assignee: Jersey Production Research Co
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Filing: 1961-08-23
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Granted: 1964-09-22
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Expires: 1981-08-23
Abstract
No abstract record available.
Inventors
- 👤 Benjamin F Pennington
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 08:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/267; Y; Y10; Y10S; Y10S507/00; Y10S507/922; Y10S507/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
48 words
IN A METHOD FOR FRACTURING A SUBSURFACE EARTH FORMATION IN WHICH SUFFICIENT HYDRAULIC PRESSURE IS EXERTED ON SAID FORMATION TO FRACTURE SAME, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE RESULTING FRACTURES PARTICLES CONSISTING ESSENTIALLY OF SOLID POLYOLEFIN WHEREBY SAID FRACTURES ARE MAINTAINED OPEN FOR FLOW OF FLUID THERETHROUGH.
Claim 2
Dependent Claim
48 words
IN A METHOD FOR FRACTURING A SUBSURFACE EARTH FORMATION IN WHICH SUFFICIENT HYDRAULIC PRESSURE IS EXERTED ON SAID FORMATION TO FRACTURE SAME, THE IMPROVEMENT WHICH COMPRISES INTRODUCING INTO THE RESULTING FRACTURES PARTICLES CONSISTING ESSENTIALLY OF SOLID POLYOLEFIN WHEREBY SAID FRACTURES ARE MAINTAINED OPEN FOR FLOW OF FLUID THERETHROUGH.
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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) | 1967-09-22 | 1968-03-23 | 1968-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-22 | 1972-03-23 | 1972-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-22 | 1976-03-23 | 1976-09-22 | $7700.00 | Window Closed / Lapsed |