Apparatus for extraction of drugs and toxic substances from blood, serum and other liquid
Abstract
Abstract Said apparatus is housed on and in a convenient metal frame. It has three extraction chambers arranged vertically. It extracts the desired drug or toxic substance from the sample with a suitable solvent. This extraction is carried out in the upper extraction chamber, after which the solvent is filtered into the midextraction chamber, and the sample or aqueous phase is retained. The middle extraction chamber contains carbon black, some other adsorbing agent or aqueous solution which effects the purification of the solvent. The solvent is filtered a second time into the lower extraction chamber where the desired drug or toxic substance is reextracted from the solvent into an acidic or basic solution, depending on its chemical nature. The actual extractions and purification are effected by a shaking motion of the extraction chambers, and all operations (extractions, purification and filtrations) are done automatically according to a predetermined program.
Inventors
- 👤 Eric S Wright
Bibliographic Details
Claims Analysis
Total Claims: 1References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |