US2819038A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reservoir sampling
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-01-14
•
Granted: 1958-01-07
•
Expires: 1975-01-14
Abstract
No abstract record available.
Inventors
- 👤 John E Eckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 16:22
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/02; E21B27/00; E21B4/00; E21B4/18; E21B21/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
14 words
AN APPARATUS FOR OBTAINING AN UNCONTAMINATED SAMPLE FROM A SUBTERRANEAN FORMATION IMMEDIATELY BELOW A
Claim 2
Independent Claim
14 words
AN APPARATUS FOR OBTAINING AN UNCONTAMINATED SAMPLE FROM A SUBTERRANEAN FORMATION IMMEDIATELY BELOW A
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |