US3436084A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Packer for well treatment
Assignee: Schlumberger Technology Corp
•
Filing: 1966-01-10
•
Granted: 1969-04-01
•
Expires: 1986-01-10
Abstract
No abstract record available.
Inventors
- 👤 Leo A Courter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:12
CPC Classifications
E; E21; E21B; E21B33/00; E21B33/10; E21B33/12; E21B33/129; E21B33/1208; E21B33/1216
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1574922A
Cited
US2368400A
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US2368928A
Cited
US2430623A
Cited
US2609258A
Cited
US2715441A
Cited
US2874436A
Cited
US3169025A
Cited
US3303885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-31 | 1972-09-30 | 1973-04-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-31 | 1976-09-30 | 1977-04-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-31 | 1980-09-30 | 1981-04-01 | $7700.00 | Window Closed / Lapsed |