Patent US3144773A successfully refreshed from Google Patents.
US3144773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sedimentation apparatus and method for determining particle size distribution
Assignee: Individual
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Filing: 1962-12-26
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Granted: 1964-08-18
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Expires: 1982-12-26
Abstract
No abstract record available.
Inventors
- 👤 Hadley R Bramel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:49
CPC Classifications
G; G01; G01N; G01N15/00; G01N15/04; G01N30/00; G01N30/0005
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
217 words
A METHOD FOR DETERMINING THE PARTICLE SIZE DISTRIBUTION OF A POWDERY MATERIAL COMPRISING THE STEPS OF: (A) ADDING SAID POWDERY MATERIAL TO THE FLUID OF A CLOSED CIRCULATORY FLUID SYSTEM HAVING A VERTICALLY TUBULAR PORTION; (B) DISPERSING SAID POWDERY MATERIAL EVENLY THROUGH THE FLUID BY CIRCULATING THE FLUID THROUGH SAID FLUID SYSTEM; (C) BRINGING THE CIRCULATING FLUID TO A COMPLETE REST AFTER SAID POWDERY MATERIAL IS EVENLY DISTRIBUTED BY SHUTTING OFF CIRCULATION AND LETTING A FIRST TIME PERIOD ELAPSE AFTER SHUTTING OFF CIRCULATION, SAID FIRST TIME PERIOD BEING SUFFICIENTLY LONG FOR ALL VORTICES AND BUBBLES TO DIE OUT; (D) ISOLATING A SECTION OF SAID VERTICAL TUBULAR PORTION AT THE END OF SAID FIRST TIME PERIOD TO DEFINE A SEDIMENTATION TUBE; (E) PERMITTING AXIAL SEDIMENTATION OF THE DISPERSED POWDERY MATERIAL IN THE SEDIMENTATION TUBE FOR A SECOND TIME PERIOD WHICH COMMENCES WITH THE ISOLATION, SAID SECOND TIME PERIOD BEING SELECTED TO PROVIDE A DESIRED DISTRIBUTION OF PARTICLES IN THE SEDIMENTATION TUBE; AND (F) ARRESTING SAID AXIAL SEDIMENTATION IMMEDIATELY AFTER THE END OF SAID SECOND TIME PERIOD BY TURNING SAID SEDIMENTATION TUBE TO A HORIZONTAL POSITION SO THAT THE POWDERY MATERIAL SETTLES TO FORM A RIBBON ALONG THE LOWER LENGTH OF THE SEDIMENTATION TUBE WHICH RIBBON PROVIDES DATA USEFUL FOR DETERMINING THE PARTICLE SIZE DISTRIBUTION OF SAID POWDERY MATERIAL.
Claim 2
Independent Claim
217 words
A METHOD FOR DETERMINING THE PARTICLE SIZE DISTRIBUTION OF A POWDERY MATERIAL COMPRISING THE STEPS OF: (A) ADDING SAID POWDERY MATERIAL TO THE FLUID OF A CLOSED CIRCULATORY FLUID SYSTEM HAVING A VERTICALLY TUBULAR PORTION; (B) DISPERSING SAID POWDERY MATERIAL EVENLY THROUGH THE FLUID BY CIRCULATING THE FLUID THROUGH SAID FLUID SYSTEM; (C) BRINGING THE CIRCULATING FLUID TO A COMPLETE REST AFTER SAID POWDERY MATERIAL IS EVENLY DISTRIBUTED BY SHUTTING OFF CIRCULATION AND LETTING A FIRST TIME PERIOD ELAPSE AFTER SHUTTING OFF CIRCULATION, SAID FIRST TIME PERIOD BEING SUFFICIENTLY LONG FOR ALL VORTICES AND BUBBLES TO DIE OUT; (D) ISOLATING A SECTION OF SAID VERTICAL TUBULAR PORTION AT THE END OF SAID FIRST TIME PERIOD TO DEFINE A SEDIMENTATION TUBE; (E) PERMITTING AXIAL SEDIMENTATION OF THE DISPERSED POWDERY MATERIAL IN THE SEDIMENTATION TUBE FOR A SECOND TIME PERIOD WHICH COMMENCES WITH THE ISOLATION, SAID SECOND TIME PERIOD BEING SELECTED TO PROVIDE A DESIRED DISTRIBUTION OF PARTICLES IN THE SEDIMENTATION TUBE; AND (F) ARRESTING SAID AXIAL SEDIMENTATION IMMEDIATELY AFTER THE END OF SAID SECOND TIME PERIOD BY TURNING SAID SEDIMENTATION TUBE TO A HORIZONTAL POSITION SO THAT THE POWDERY MATERIAL SETTLES TO FORM A RIBBON ALONG THE LOWER LENGTH OF THE SEDIMENTATION TUBE WHICH RIBBON PROVIDES DATA USEFUL FOR DETERMINING THE PARTICLE SIZE DISTRIBUTION OF SAID POWDERY MATERIAL.
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) | 1967-08-18 | 1968-02-17 | 1968-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-18 | 1972-02-17 | 1972-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-18 | 1976-02-17 | 1976-08-18 | $7700.00 | Window Closed / Lapsed |