Patent US3421584A successfully refreshed from Google Patents.
US3421584A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Grouting,plugging,and consolidating method
Assignee: Schlumberger Technology Corp
•
Filing: 1967-03-23
•
Granted: 1969-01-14
•
Expires: 1987-03-23
Abstract
No abstract record available.
Inventors
- 👤 Louis H Eilers
- 👤 Christ F Parks
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:12
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/13; E21B33/134; C; C09; C09K; C09K8/00; C09K8/50; 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)
US3056757A
Cited
US3116264A
Cited
US3302717A
Cited
US3306870A
Cited
US3334689A
Cited
US3336979A
Cited
US3353601A
Cited
US3308885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-01-14 | 1972-07-15 | 1973-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-01-14 | 1976-07-15 | 1977-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-01-14 | 1980-07-15 | 1981-01-14 | $7700.00 | Window Closed / Lapsed |