US3075694A
Expired / Lapsed
US
⏱️ 0.0 years remaining
anderson
Assignee: —
•
Filing: —
•
Granted: 1963-01-29
•
Expires: 1980-01-29
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:31
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/26; B01D21/262; B04; B04B; B04B1/00; B04B1/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A PROCESS FOR INCREASING THE RATE OF SEDIMENTATION OF PARTICLES OF MOLECULAR SIZE IN A SUSPENSION COMPRISING STEPS OF POSITIONING INSOLUBLE POWDERED MATERIAL IN A CENTRIFUGE CELL, INTRODUCING THE SUSPENSION HAVING THE PARTICLES OF MOLECULAR SIZE TO BE SEPARATED INTO THE CELLS, CENTRIFUGING THE CELL FOR A PERIOD SUFFICIENTLY LONG TO PACK THE POWDERED MATERIAL, THEN ADDING ADDITIONAL POWDERED MATERIAL AND AGAIN CENTRIFUGING THE CELL TO CAUSE THE PARTICLES TO IMPINGE UPON THE SURFACES OF THE POWDERED MATERIAL AND INDUCE PREFERENTIAL FLOW OF FLUID RICHER IN SAID PARTICLES IN THE DIRECTION OF THE CENTRIFUGAL FORCE SET UP BY THE CENTRIFUGING.
Claim 2
Dependent Claim
100 words
A PROCESS FOR INCREASING THE RATE OF SEDIMENTATION OF PARTICLES OF MOLECULAR SIZE IN A SUSPENSION COMPRISING STEPS OF POSITIONING INSOLUBLE POWDERED MATERIAL IN A CENTRIFUGE CELL, INTRODUCING THE SUSPENSION HAVING THE PARTICLES OF MOLECULAR SIZE TO BE SEPARATED INTO THE CELLS, CENTRIFUGING THE CELL FOR A PERIOD SUFFICIENTLY LONG TO PACK THE POWDERED MATERIAL, THEN ADDING ADDITIONAL POWDERED MATERIAL AND AGAIN CENTRIFUGING THE CELL TO CAUSE THE PARTICLES TO IMPINGE UPON THE SURFACES OF THE POWDERED MATERIAL AND INDUCE PREFERENTIAL FLOW OF FLUID RICHER IN SAID PARTICLES IN THE DIRECTION OF THE CENTRIFUGAL FORCE SET UP BY THE CENTRIFUGING.
References Cited (Backward Citations)
US868483A
Cited
US1605596A
Cited
US1648369A
Cited
US1938894A
Cited
US1893451A
Cited
US2271501A
Cited
US2596082A
Cited
US2559453A
Cited
US2628021A
Cited
US2822126A
Cited
US2816660A
Cited
US2854143A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-01-28 | 1966-07-30 | 1967-01-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-01-28 | 1970-07-30 | 1971-01-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-01-28 | 1974-07-30 | 1975-01-29 | $7700.00 | Window Closed / Lapsed |