US3859843A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for measuring surfaces by mercury intrusion
Assignee: Quantachrome Corp
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Filing: 1972-11-10
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Granted: 1975-01-14
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Expires: 1992-11-10
Abstract
Abstract An apparatus for practicing the technique of mercury penetration or intrusion to determine the pore size distribution of a porous test sample which utilizes centrifugal force and, as a consequence, facilitates supervising the extent of said mercury intrusion under the prevailing conditions of pressure so that the pore size distribution is readily and effectively indicated by the apparatus.
Inventors
- 👤 Seymour Lowell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:51
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/08; G01N15/088; G01N15/0886
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
239 words
An apparatus for intruding measured quantities of a fluid at selected pressures into penetrating relation with a porous test surface comprising a rotatably mounted conduit means defining a flow passage for said intruding fluid terminating in opposite proximal and distal operative ends, wall means at said distal end in communication with said flow passage defining a storage chamber for said test surface, transparent wall means at said proximal end in communication with said flow passage bounding a storage compartment for said intruding fluid, sensing means operatively arranged at said proximal end adapted to maintain visual supervision of said intruding fluid in said transparent storage compartment so as to indicate any volume changes therein, said fluid storage compartment being of a comparatively small cross-sectional area so as to manifest any fluid volume change therein as a comparatively large movement of the level of said fluid along the longitudinal axis of said compartment, speedcontrol means operatively arranged to provide rotation of said conduit means at known selected speeds causing intruding flow of said fluid through said flow passage into said test surface, whereby said intruding flow produces corresponding volume changes in said fluid that are measured by said sensing means, a display means for displaying said measured quantities of intruded fluid and said selected pressures corresponding to said rotational speeds of said conduit means, and means connected from said speed-control means and from said sensing means to operate said display means.
Claim 2
Independent Claim
239 words
An apparatus for intruding measured quantities of a fluid at selected pressures into penetrating relation with a porous test surface comprising a rotatably mounted conduit means defining a flow passage for said intruding fluid terminating in opposite proximal and distal operative ends, wall means at said distal end in communication with said flow passage defining a storage chamber for said test surface, transparent wall means at said proximal end in communication with said flow passage bounding a storage compartment for said intruding fluid, sensing means operatively arranged at said proximal end adapted to maintain visual supervision of said intruding fluid in said transparent storage compartment so as to indicate any volume changes therein, said fluid storage compartment being of a comparatively small cross-sectional area so as to manifest any fluid volume change therein as a comparatively large movement of the level of said fluid along the longitudinal axis of said compartment, speedcontrol means operatively arranged to provide rotation of said conduit means at known selected speeds causing intruding flow of said fluid through said flow passage into said test surface, whereby said intruding flow produces corresponding volume changes in said fluid that are measured by said sensing means, a display means for displaying said measured quantities of intruded fluid and said selected pressures corresponding to said rotational speeds of said conduit means, and means connected from said speed-control means and from said sensing means to operate said display means.
References Cited (Backward Citations)
US3683674A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-01-13 | 1978-07-15 | 1979-01-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-13 | 1982-07-15 | 1983-01-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-13 | 1986-07-15 | 1987-01-14 | $7700.00 | Window Closed / Lapsed |