US3240692A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electrophoretic fractionation of ampholytes
Assignee: Swift Independent Packing Co
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Filing: 1965-03-19
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Granted: 1966-03-15
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Expires: 1985-03-19
Abstract
No abstract record available.
Inventors
- 👤 Thomas H Donnelly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:08
CPC Classifications
C; C25; C25B; C25B7/00; G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/447; G01N27/44756; G01N27/4476; G01N27/44769; G01N27/44782
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A METHOD FOR CONTINUOUSLY SEPARATING COLLOIDAL ORGANIC AMPHOLYTES FROM ANAQUEOUS ELECTROLYTE SOLUTION CONTAINING SAID AMPHOLYTES COMPRISING: INTRODUCTING SAID SOLUTION INTO AN ELECTROPHORETIC APPARATUS; IMPRESSING A VOLTAGE ACROSS SAID LIQUID CARRIER IN A DIRECTION TRANSVERSE TO THE FLOW OF SAID LIQUID WHEREBY TO CAUSE SAID AMPHOLYTES TO MIGRATE TOWARD OF A REGION OF ELECTRICAL CHARGE OPPOSITE TO THAT OF AMPHOLYTE FRACTIONS; PASSING SAID AMPHOLYTES THROUGH MEMBERS PERMEABLE TO COLLOIDAD MATERIALS AND THROUGH ZONES, MEASURING AND ADJUSTING THE PH IN SAID ZONES TO MAINTAIN SAID ZONES AT GIVEN PH VALUES IN A STEP-WISE PH GRADIENT; CONDUCTING SAID AMPHOLYTE TO A ZONE MAINTAINED AT A CONSTANT PH WHERE
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |