US2903072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for investigating earth formations
Assignee: Schlumberger Well Surveying Corp
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Filing: 1955-09-23
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Granted: 1959-09-08
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Expires: 1975-09-23
Abstract
No abstract record available.
Inventors
- 👤 Mennecier Aline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 11:06
CPC Classifications
E; E21; E21B; E21B49/00; E21B49/08; E21B49/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
79 words
IN AN EARTH FORMATION FLUID SAMPLER, A PROJECTILE COMPRISING: A BODY ADAPTED TO BE IMPELLED TOWARD AND INTO A SELECTED EARTH FORMATION AND INCLUDING A FORWARD SECTION AND A REARWARD SECTION, SAID FORWARD SECTION HAVING A HOLLOW CHAMBER ADAPTED TO RECEIVE FORMATION FLUID, SAID REARWARD SECTION HAVING AN ANNULAR RECESS; AN ANNULAR SEALING MEMBER OF RESILIENT MATERIAL DISPOSED IN SAID RECESS HAVING AN OUTER SURFACE OF FRUSTO-CONICAL FORM AND AN INNER SURFACE WITH A PORTION THEREOF WITH A FURS-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |