Patent US2051018A successfully refreshed from Google Patents.
US2617296A
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Process for treating core samples
Assignee: Core Laboratories Inc
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Filing: 1946-12-20
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Granted: 1952-11-11
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Expires: 1966-12-20
Abstract
No abstract record available.
Inventors
- 👤 John D Wisenbaker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:21
CPC Classifications
E; E21; E21B; E21B25/00; E21B25/08; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/2525
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
43 words
THE METHOD OF HANDLING AND/OR PRESERVING OIL WELL CORE SAMPLES FOR STUDY THAT COMPRISES SUBJECTING A CORE SAMPLE TO DEEP FREEZING PROMPTLY AFTER EXTRACTION FROM THE WELL, AND MAINTAINING THE SAMPLE IN SAID FROZEN CONDITION UNTIL STUDY OF THE SAMPLE CAN BE UNDERTAKEN.
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) | 1955-11-11 | 1956-05-12 | 1956-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-11 | 1960-05-12 | 1960-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-11 | 1964-05-12 | 1964-11-11 | $7700.00 | Window Closed / Lapsed |