US3432667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Borehole fluid excluder releasably coupled to borehole tool
Assignee: Mobil Oil AS
•
Filing: 1965-04-12
•
Granted: 1969-03-11
•
Expires: 1985-04-12
Abstract
No abstract record available.
Inventors
- 👤 Richard L Caldwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 09:09
CPC Classifications
G; G01; G01V; G01V5/00; G01V5/04; G01V5/08; G01V5/10; E; E21; E21B; E21B31/00; E21B31/107
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US509908A
Cited
US2652496A
Cited
US2747100A
Cited
US3065346A
Cited
US3097696A
Cited
US3211230A
Cited
US3288210A
Cited
US3294171A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1972-03-10 | 1972-09-09 | 1973-03-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-03-10 | 1976-09-09 | 1977-03-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-03-10 | 1980-09-09 | 1981-03-11 | $7700.00 | Window Closed / Lapsed |