US3720593A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for high resolution zone electrophoresis
Assignee: Beckman Coulter Inc
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Filing: 1972-01-17
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Granted: 1973-03-13
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Expires: 1992-01-17
Abstract
Abstract A method of separating particles by zone electrophoresis by applying a potential gradient in one direction, allowing particles to migrate and build-up against a barrier, then reversing the current to allow the particles to migrate away from the barrier.
Inventors
- 👤 E Juhos
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:51
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44756; G01N27/44773
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A method for separating particles by zone electrophoresis, comprising the steps of applying to an electrolytic carrier medium a quantity of sample including said particles, said medium having a barrier impermeable to said particles; applying to said carrier medium a potential gradient in a first direction causing said particles to migrate toward said barrier and concentrate at said barrier; removing said potential gradient; and applying to said carrier medium a potential gradient in a second direction to cause said particles to migrate away from said barrier and undergo electrophoretic separation.
Claim 2
Independent Claim
90 words
A method for separating particles by zone electrophoresis, comprising the steps of applying to an electrolytic carrier medium a quantity of sample including said particles, said medium having a barrier impermeable to said particles; applying to said carrier medium a potential gradient in a first direction causing said particles to migrate toward said barrier and concentrate at said barrier; removing said potential gradient; and applying to said carrier medium a potential gradient in a second direction to cause said particles to migrate away from said barrier and undergo electrophoretic separation.
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) | 1976-03-12 | 1976-09-11 | 1977-03-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-03-12 | 1980-09-11 | 1981-03-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-03-12 | 1984-09-11 | 1985-03-13 | $7700.00 | Window Closed / Lapsed |