US2878178A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Continuous free-boundary flow electrophoresis
Assignee: Individual
•
Filing: 1955-04-15
•
Granted: 1959-03-17
•
Expires: 1975-04-15
Abstract
No abstract record available.
Inventors
- 👤 Bier Milan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 10:45
CPC Classifications
B; B01; B01D; B01D57/00; B01D57/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
129 words
A METHOD FOR THE CONTINOUS CONTRATION, FRACXTIONATION OR PURIFICATION OF COLLODIAL COMPONENTS FROM THEIR SUSPENTION IN AN ELECTROPHORETIC CELL ENCLOSED BY TWO SEMIPERMEABLE MEMBRANES AND TRAVERSED BY AN ELECTRIC FIELD COMPRISING FEEDING CONTINOUSLY SUCH SUSPENSION INTO ONE END OF THE CELL, CONCENTRATING A COLLOIDAL COMPONENT OF THE SUSPENSION AT ONE SAID MEMBRANES UNDER THE INFLUENCE OF THE ELECTRIC FIELD, CONTINOUSLY WITHDRAWING SAID CONCENTRATED FRACTION OF THE SUSPENSION FROM THE OTHER END OF THE CELL, CONTINUING THE FLOW OF THE REMAINING SUSPENSION THROUGH THE CELL IN COUNTERCURRENT TO THE INCOMING SUSPENSION TOWARDS THE FEED END OF THE CELL WITHDRAWING SAID REMAINING SUSPENSION CONTINOUSLY FROM THE FEED END, AND PREVENTING INTERMINGLING OF SAID COUNTERFLOWING REMAINING SUSPENSION AND INCOMING SUSPENSION BY A PARTITION PERMITTING PASSAGE OF THE ELECTRIC FIELD ACROSS THE CELL.
Claim 2
Independent Claim
129 words
A METHOD FOR THE CONTINOUS CONTRATION, FRACXTIONATION OR PURIFICATION OF COLLODIAL COMPONENTS FROM THEIR SUSPENTION IN AN ELECTROPHORETIC CELL ENCLOSED BY TWO SEMIPERMEABLE MEMBRANES AND TRAVERSED BY AN ELECTRIC FIELD COMPRISING FEEDING CONTINOUSLY SUCH SUSPENSION INTO ONE END OF THE CELL, CONCENTRATING A COLLOIDAL COMPONENT OF THE SUSPENSION AT ONE SAID MEMBRANES UNDER THE INFLUENCE OF THE ELECTRIC FIELD, CONTINOUSLY WITHDRAWING SAID CONCENTRATED FRACTION OF THE SUSPENSION FROM THE OTHER END OF THE CELL, CONTINUING THE FLOW OF THE REMAINING SUSPENSION THROUGH THE CELL IN COUNTERCURRENT TO THE INCOMING SUSPENSION TOWARDS THE FEED END OF THE CELL WITHDRAWING SAID REMAINING SUSPENSION CONTINOUSLY FROM THE FEED END, AND PREVENTING INTERMINGLING OF SAID COUNTERFLOWING REMAINING SUSPENSION AND INCOMING SUSPENSION BY A PARTITION PERMITTING PASSAGE OF THE ELECTRIC FIELD ACROSS THE CELL.
Claim 3
Dependent Claim
169 words
AN ELECTROPHORETIC APPARATUS COMPRISING TWO SEMIPERMEABLE MEMBRANES ARRANGED IN PARALLEL PLANES DEFINING SEPARATION CELL BETWEEN ELECTRODES IN PLANES PARALLEL TO SAID MEMBRANES, A THIRD MEMBRANE PERMITTING PASSAGE OF AN ELECTRIC FIELD ACROSS THE CELL AND EXTENDING FROM ONE END OF THE CELL IN A PLANE PARALLEL TO SAID SEMIPERMEABLE MEMBRANED TO DIVIDE THE CELL INTO TWO SEPARATE COMPARTMENTS, SAID THIRD MEMBRANE HAVING AN APERTURE AT THE OTHER END OF THE CELL EXTENDING OVER THE WIDTH OF THE MEMBRANE AND PROVIDING COMMUNICATION BETWEEN SAID TWO COMPARTMENTS, INLET MEANS TO FEED CONTINUOUSLY A COLLOIDAL SUSPENSION INTO THE CLOSED END OF ONE OF SAID COMPARTMENTS, FIRST OUTLET MEANS TO WITHDRAW CONTINUOUSLY PART OF SAID SUSPENSION FROM THE END OF THE CELL ENCLOSING THE COMMUNICATING COMPARMENTS, AND SECOND OUTLET MEANS TO WITHDRAW CONTINOUSLY THE REMAINING SUSPENSION FROM THE CLOSED END OF THE OTHER COMPARTMENT, THEREBY FORCING SAID REMAINING SUSPENSION TO, FLOW IN COUNTERCURRENT WITH THE INCOMING SUSPENSION, WHILE THE INTERMINGLING OF THE TWO PORTIONS OF THE SUSPENSION IS PREVENTED BY SAID THIRD MEMBRANE.
Claim 4
Dependent Claim
169 words
AN ELECTROPHORETIC APPARATUS COMPRISING TWO SEMIPERMEABLE MEMBRANES ARRANGED IN PARALLEL PLANES DEFINING SEPARATION CELL BETWEEN ELECTRODES IN PLANES PARALLEL TO SAID MEMBRANES, A THIRD MEMBRANE PERMITTING PASSAGE OF AN ELECTRIC FIELD ACROSS THE CELL AND EXTENDING FROM ONE END OF THE CELL IN A PLANE PARALLEL TO SAID SEMIPERMEABLE MEMBRANED TO DIVIDE THE CELL INTO TWO SEPARATE COMPARTMENTS, SAID THIRD MEMBRANE HAVING AN APERTURE AT THE OTHER END OF THE CELL EXTENDING OVER THE WIDTH OF THE MEMBRANE AND PROVIDING COMMUNICATION BETWEEN SAID TWO COMPARTMENTS, INLET MEANS TO FEED CONTINUOUSLY A COLLOIDAL SUSPENSION INTO THE CLOSED END OF ONE OF SAID COMPARTMENTS, FIRST OUTLET MEANS TO WITHDRAW CONTINUOUSLY PART OF SAID SUSPENSION FROM THE END OF THE CELL ENCLOSING THE COMMUNICATING COMPARMENTS, AND SECOND OUTLET MEANS TO WITHDRAW CONTINOUSLY THE REMAINING SUSPENSION FROM THE CLOSED END OF THE OTHER COMPARTMENT, THEREBY FORCING SAID REMAINING SUSPENSION TO, FLOW IN COUNTERCURRENT WITH THE INCOMING SUSPENSION, WHILE THE INTERMINGLING OF THE TWO PORTIONS OF THE SUSPENSION IS PREVENTED BY SAID THIRD MEMBRANE.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-03-16 | 1962-09-15 | 1963-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-03-16 | 1966-09-15 | 1967-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-03-16 | 1970-09-15 | 1971-03-17 | $7700.00 | Window Closed / Lapsed |