US3381749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Multiple injection packers
Assignee: Baker Hughes Oilfield Operations LLC
•
Filing: 1965-09-07
•
Granted: 1968-05-07
•
Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 David V Chenoweth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:19
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/124
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
CA633905A
Cited
US2019418A
Cited
US2107006A
Cited
US2141419A
Cited
US2227539A
Cited
US2611436A
Cited
US2760581A
Cited
US3118501A
Cited
US3273647A
Cited
US3318381A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |