Patent EP0140137B1 successfully refreshed from Google Patents.
Patent US3379253A successfully refreshed from Google Patents.
US3379253A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plugging of vugged and porous strata
Assignee: Phillips Petroleum Co
•
Filing: 1965-08-16
•
Granted: 1968-04-23
•
Expires: 1985-08-16
Abstract
No abstract record available.
Inventors
- 👤 Melvin E Chism
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:29
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/138
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2274297A
Cited
US2502191A
Cited
US2761511A
Cited
US3181611A
Cited
US3181612A
Cited
US3141513A
Cited
US3306356A
Cited
US3299953A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |