US3399729A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retrievable well packer
Assignee: Schlumberger Technology Corp
•
Filing: 1966-12-30
•
Granted: 1968-09-03
•
Expires: 1986-12-30
Abstract
No abstract record available.
Inventors
- 👤 Howard L Mcgill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 19:17
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1295; E21B33/12955
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2878877A
Cited
US3020959A
Cited
US3233675A
Cited
US3283824A
Cited
US3283819A
Cited
US3338308A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-09-03 | 1972-03-04 | 1972-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-03 | 1976-03-04 | 1976-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-03 | 1980-03-04 | 1980-09-03 | $7700.00 | Window Closed / Lapsed |