US3393741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fracturing subsurface formations
Assignee: Gulf Research and Development Co
•
Filing: 1966-05-27
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Granted: 1968-07-23
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Expires: 1986-05-27
Abstract
No abstract record available.
Inventors
- 👤 Jimmie L Huitt
- 👤 Bruce B Mcglothlin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:13
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/25; E21B43/26; E21B43/2605
Claims Analysis
Total Claims: 0
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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) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |