US3043379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Formation sampler
Assignee: Lane Wells Co
•
Filing: 1957-10-01
•
Granted: 1962-07-10
•
Expires: 1977-10-01
Abstract
No abstract record available.
Inventors
- 👤 Forrest V Porter
- 👤 Surbatovich Milo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 19:13
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B49/04; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1866828A
Cited
US2080184A
Cited
US2307729A
Cited
US2833215A
Cited
US2915284A
Cited
US2825533A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-07-09 | 1966-01-08 | 1966-07-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-07-09 | 1970-01-08 | 1970-07-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-07-09 | 1974-01-08 | 1974-07-10 | $7700.00 | Window Closed / Lapsed |