US2648636A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separation of colloids in a colloid solution
Assignee: RCA Corp
•
Filing: 1951-03-30
•
Granted: 1953-08-11
•
Expires: 1971-03-30
Abstract
No abstract record available.
Inventors
- 👤 Sidney G Ellis
- 👤 Peter C Stevenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:09
CPC Classifications
B; B01; B01J; B01J13/00; B01J13/0004; B01J13/0039
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
98 words
A SYSTEM FOR CONCENTRATING ELECTRICALLY CHARGED COLLOIDS HAVING A KNOWN DENSITY AND DIAMETER IN A COLLOIDAL SOLUTION OF A KNOWN DENSITY AND VISCOSITY, COMPRISING MEANS INCLUDING A ROTOR TO APPLY A CENTRIFUGAL FORCE TO SAID SOLUTION AT A KNOWN ANGULAR VELOCITY, MEANS INCLUDING AN ELECTROMAGNET TO APPLY TO SAID SOLUTION A KNOWN NON-UNIFORM MAGNETIC FIELD AT RIGHT ANGLES TO SAID CENTRIFUGAL FORCE AND WITH A SENSE TO APPLY A CENTRIPETAL FORCE TO SAID COLLOIDS WHEREBY SAID COLLOIDS ARE CONCENTRATED AT A LEVEL WITHIN THE CARRIER OF SAID COLLOIDS DEPENDENT UPON THE CHARGE TO MASS RATIO OF SAID COLLOIDS.
Claim 2
Independent Claim
98 words
A SYSTEM FOR CONCENTRATING ELECTRICALLY CHARGED COLLOIDS HAVING A KNOWN DENSITY AND DIAMETER IN A COLLOIDAL SOLUTION OF A KNOWN DENSITY AND VISCOSITY, COMPRISING MEANS INCLUDING A ROTOR TO APPLY A CENTRIFUGAL FORCE TO SAID SOLUTION AT A KNOWN ANGULAR VELOCITY, MEANS INCLUDING AN ELECTROMAGNET TO APPLY TO SAID SOLUTION A KNOWN NON-UNIFORM MAGNETIC FIELD AT RIGHT ANGLES TO SAID CENTRIFUGAL FORCE AND WITH A SENSE TO APPLY A CENTRIPETAL FORCE TO SAID COLLOIDS WHEREBY SAID COLLOIDS ARE CONCENTRATED AT A LEVEL WITHIN THE CARRIER OF SAID COLLOIDS DEPENDENT UPON THE CHARGE TO MASS RATIO OF SAID COLLOIDS.
Claim 3
Dependent Claim
119 words
APPARATUS FOR CONCENTRATING ELECTRICALLY CHARGED COLLOIDS IN A COLLOIDAL MIXTURE COMPRISING MEANS INCLUDING A ROTOR TO ROTATE SAID COLLOIDAL MIXTURE ABOUT AN AXIS AT A KNOWN ANGULAR VELOCITY TO APPLY A CENTRIFUGAL FORCE THERETO, MEANS INCLUDING AN ELECTROMAGNET TO APPLY TO SAID MIXTURE A MAGNETIC FIELD PARALLEL TO THE AXIS OF ROTATION AND HAVING AN INTENSITY THAT RANGES FROM A MAXIMUM TO A MINIMUM THROUGH SAID COLLOIDAL MIXTURE, THE POLARITY OF SAID MAGNETIC FIELD BEING SUCH AS TO APPLY A CENTRIPETAL FORCE TO SAID COLLOIDS WHEREBY SAID COLLOIDS ARE CONCENTRATED AT A LEVEL WITHIN THE CARRIER OF SAID COLLOIDS DEPENDENT UPON THE CHARGE ON SAID COLLOIDS, AND MEANS TO MEASURE THE DISTANCE OF SAID COLLOIDAL CONCENTRATION FROM SAID AXIS.
Claim 4
Dependent Claim
119 words
APPARATUS FOR CONCENTRATING ELECTRICALLY CHARGED COLLOIDS IN A COLLOIDAL MIXTURE COMPRISING MEANS INCLUDING A ROTOR TO ROTATE SAID COLLOIDAL MIXTURE ABOUT AN AXIS AT A KNOWN ANGULAR VELOCITY TO APPLY A CENTRIFUGAL FORCE THERETO, MEANS INCLUDING AN ELECTROMAGNET TO APPLY TO SAID MIXTURE A MAGNETIC FIELD PARALLEL TO THE AXIS OF ROTATION AND HAVING AN INTENSITY THAT RANGES FROM A MAXIMUM TO A MINIMUM THROUGH SAID COLLOIDAL MIXTURE, THE POLARITY OF SAID MAGNETIC FIELD BEING SUCH AS TO APPLY A CENTRIPETAL FORCE TO SAID COLLOIDS WHEREBY SAID COLLOIDS ARE CONCENTRATED AT A LEVEL WITHIN THE CARRIER OF SAID COLLOIDS DEPENDENT UPON THE CHARGE ON SAID COLLOIDS, AND MEANS TO MEASURE THE DISTANCE OF SAID COLLOIDAL CONCENTRATION FROM SAID AXIS.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |