US3289467A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for testing drilling mud characteristics
Assignee: Phillips Petroleum Co
•
Filing: 1964-03-30
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Granted: 1966-12-06
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 Harry W Parker
- 👤 Charles J Engle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:32
CPC Classifications
G; G01; G01N; G01N33/00; G01N15/00; G01N15/08; G01N15/082; G01N15/0826; G01N33/26; G01N33/28; G01N33/2823
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A PROCESS FOR DETERMINING THE LIQUID LOSS RATE OF DRILLING MUD WHICH COMPRISES: (1) MAINTAINING A MASS OF SAID MUD IN AN ENCLOSED ZONE UNDER A SUBSTANTIAL PRESSURE; (2) ROTATING A HOLLOW CYLINDRICAL FILTERING HEAD IN THE MUD IN SAID ZONE; (3) MAINTAINING A PRESSURE DIFFERENTIAL RADIALLY ACROSS SAID FILTERING MEANS SO AS TO CAUSE FILTRATE TO PASS RADIALLY THRU THE FILTER HEAD, THEREBY FORMING A FILTER
Claim 2
Dependent Claim
67 words
A PROCESS FOR DETERMINING THE LIQUID LOSS RATE OF DRILLING MUD WHICH COMPRISES: (1) MAINTAINING A MASS OF SAID MUD IN AN ENCLOSED ZONE UNDER A SUBSTANTIAL PRESSURE; (2) ROTATING A HOLLOW CYLINDRICAL FILTERING HEAD IN THE MUD IN SAID ZONE; (3) MAINTAINING A PRESSURE DIFFERENTIAL RADIALLY ACROSS SAID FILTERING MEANS SO AS TO CAUSE FILTRATE TO PASS RADIALLY THRU THE FILTER HEAD, THEREBY FORMING A FILTER
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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) | 1969-12-05 | 1970-06-06 | 1970-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-05 | 1974-06-06 | 1974-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-05 | 1978-06-06 | 1978-12-06 | $7700.00 | Window Closed / Lapsed |