Patent US2982704A successfully refreshed from Google Patents.
US2982704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Encasement of unconsolidated oil reservoir rock samples
Assignee: Jersey Production Research Co
•
Filing: 1958-05-05
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Granted: 1961-05-02
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Expires: 1978-05-05
Abstract
No abstract record available.
Inventors
- 👤 John E Shelton
- 👤 George W Shurtleff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 21:35
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A METHOD FOR PREPARING FRIABLE EARTH SAMPLES FOR ANALYSIS INVOLVING THE SUBJECTION OF SAID FRIABLE EARTH SAMPLES TO PRESSURES OF AT LEAST 200 P.S.I., TO TEMPERATURES OF AT LEAST 250* C., AND TO PETROLEUM SOLVENTS, COMPRISING: CUTTING SAID SAMPLES TO A GENERALLY CYLINDRICAL SHAPE, PLACING A METAL END PLATE AT EACH END OF THE CYLINDRICAL SAMPLE, THINLY COATING THE SAMPLE AND METAL END PLATE WITH LEAD OXIDE IN ADMIXTURE WITH GLYCERIN, AND REACTING THE LEAD OXIDE-GLYCERIN MIXTURE FOR A TIME INTERVAL OF SUFFICIENT DURATION FOR THE MIX-
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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) | 1964-05-01 | 1964-10-31 | 1965-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-05-01 | 1968-10-31 | 1969-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-05-01 | 1972-10-31 | 1973-05-02 | $7700.00 | Window Closed / Lapsed |