US3784467A
Expired / Lapsed
US
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Droplet countercurrent chromatography
Assignee: United States Department of Health and Human Services
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Filing: 1971-05-26
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Granted: 1974-01-08
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Expires: 1991-05-26
Abstract
Abstract A DROPLET CONTERCURRENT CHROMATOGRAPHIC ALL-LIQUID SEPARATION TECHNIQUE FOR PARTITIONING A SOLUTE BETWEEN A STEADY STREAM OF DROPLETS OF MOVING THE PHASE AND A COLUMN OF SURROUNDING STATIONARY LIQUID PHASE. MILLIGRAM QUANTITIES OF BIOCHEMICALS MAY BE SEPARATED USING THIS PROCESS. D R A W I N G
Inventors
- 👤 T Tanimura
- 👤 Y Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:13
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N30/42
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-07 | 1977-07-09 | 1978-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-07 | 1981-07-09 | 1982-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-07 | 1985-07-09 | 1986-01-08 | $7700.00 | Window Closed / Lapsed |