US3172286A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for testing fracturing and related fluids
Assignee: Atlantic Richfield Co
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Filing: 1961-03-20
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Granted: 1965-03-09
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Expires: 1981-03-20
Abstract
No abstract record available.
Inventors
- 👤 William E Grubb
- 👤 John S Cave
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:20
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; B; B01; B01D; B01D35/00; B01D35/18; E; E21; E21B; E21B21/00; E21B21/003
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
APPARATUS FOR PRESSURE FILTRATION TESTING OF FLUIDS COMPRISING AN ELONGATED TEST CELL ADAPTED TO RECEIVE THE FLUID TO BE TESTED, HOLDER MEANS CONTAINING A POROUS MEDIUM, SAID HOLDER MEANS MOUNTED ADJACENT ONE END OF SAID CELL AND IN OPEN COMMUNICATION THEREWITH, PISTON MEANS MOUNTED IN SAID CELL AND ADAPTED TO TRAVERSE SUBSTANTIALLY THE ENTIRE LENGTH OF SAID CELL AND PRESSURIZE SAID TEST FLUID AGAINST SAID POROUS MEDIUM, STIRRING MEANS, ROTATABLY MOUNTED ON SAID PISTON SO AS TO MOVE THROUGH SAID CELL
Claim 2
Dependent Claim
81 words
APPARATUS FOR PRESSURE FILTRATION TESTING OF FLUIDS COMPRISING AN ELONGATED TEST CELL ADAPTED TO RECEIVE THE FLUID TO BE TESTED, HOLDER MEANS CONTAINING A POROUS MEDIUM, SAID HOLDER MEANS MOUNTED ADJACENT ONE END OF SAID CELL AND IN OPEN COMMUNICATION THEREWITH, PISTON MEANS MOUNTED IN SAID CELL AND ADAPTED TO TRAVERSE SUBSTANTIALLY THE ENTIRE LENGTH OF SAID CELL AND PRESSURIZE SAID TEST FLUID AGAINST SAID POROUS MEDIUM, STIRRING MEANS, ROTATABLY MOUNTED ON SAID PISTON SO AS TO MOVE THROUGH SAID CELL
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) | 1968-03-08 | 1968-09-07 | 1969-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-08 | 1972-09-07 | 1973-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-08 | 1976-09-07 | 1977-03-09 | $7700.00 | Window Closed / Lapsed |