Patent US2903342A successfully refreshed from Google Patents.
US2903342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for fractionated extraction using more than two solvents
Assignee: Individual
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Filing: 1958-04-01
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Granted: 1959-09-08
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Expires: 1978-04-01
Abstract
No abstract record available.
Inventors
- 👤 Buchler Joseph
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:40
CPC Classifications
B; B01; B01D; B01D11/00; B01D11/04; B01D11/0476
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
173 words
A DEVICE FOR THE FRACTIONATION OF A MIXTURE, COMPRISING AN ELONGATED TUBE, A DIAPHRAGM IN SAID TUBE SUBDIVIDING AN ELONGATED TUBE, A DIAPHRAGM INTO CHAMBER, AND A DUCT RISING FROM SAID DIAPHGRAM INTO SAID UPPER CHAMBER AND FORMING A PASSAGE INTERCONNECTING SAID CHAMBERS, SAID TUBE BEING PROVIDED WITH TWO ENTRANCE APERTURES OPENING INTO SAID UPPER CHAMBER AT DIFFERENT ELEVATIONS ABOVE THE UPPER END OF SAID DUCT, SAID TUBE BEING FURTHER PROVIDED WITH A LOWER AND AN UPPER EXIT APERTURE OPENING INTO SAID LOWER CHAMBER, THE END LEVELS ABOVE THE BOTTOM CHAMBER EXTENDING BETWEEN SAID PORTION OF SAID LOWER CHAMBER EXTENDING BETWEEN SAID BOTTOM AND THE LEVEL CHAMBER EXTENDING BETWEEN SAID SUBSTANTIALLY SMALLER VOLUME THAN THE PORTION OF SAID UPPER CHAMBER EXTENDING BETWEEN THE LEVELS OF SAID UPPER END OF SAID DUCT AND OF THE LOWER ONE OF SAID ENTRANCE APERTURES, BOTH OF SAID ENTRANCE APERTURES BEING LOCATED ON THE SAME SIDE OF SAID UPPER CHAMBER, SAID EXIT APERTURES, BEING PROVIDED ON A SIDE OF SAID TUBE OPPOSITE THE SIDE OF SAID ENTRANCE APERTURES.
Claim 2
Independent Claim
173 words
A DEVICE FOR THE FRACTIONATION OF A MIXTURE, COMPRISING AN ELONGATED TUBE, A DIAPHRAGM IN SAID TUBE SUBDIVIDING AN ELONGATED TUBE, A DIAPHRAGM INTO CHAMBER, AND A DUCT RISING FROM SAID DIAPHGRAM INTO SAID UPPER CHAMBER AND FORMING A PASSAGE INTERCONNECTING SAID CHAMBERS, SAID TUBE BEING PROVIDED WITH TWO ENTRANCE APERTURES OPENING INTO SAID UPPER CHAMBER AT DIFFERENT ELEVATIONS ABOVE THE UPPER END OF SAID DUCT, SAID TUBE BEING FURTHER PROVIDED WITH A LOWER AND AN UPPER EXIT APERTURE OPENING INTO SAID LOWER CHAMBER, THE END LEVELS ABOVE THE BOTTOM CHAMBER EXTENDING BETWEEN SAID PORTION OF SAID LOWER CHAMBER EXTENDING BETWEEN SAID BOTTOM AND THE LEVEL CHAMBER EXTENDING BETWEEN SAID SUBSTANTIALLY SMALLER VOLUME THAN THE PORTION OF SAID UPPER CHAMBER EXTENDING BETWEEN THE LEVELS OF SAID UPPER END OF SAID DUCT AND OF THE LOWER ONE OF SAID ENTRANCE APERTURES, BOTH OF SAID ENTRANCE APERTURES BEING LOCATED ON THE SAME SIDE OF SAID UPPER CHAMBER, SAID EXIT APERTURES, BEING PROVIDED ON A SIDE OF SAID TUBE OPPOSITE THE SIDE OF SAID ENTRANCE APERTURES.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-09-07 | 1963-03-09 | 1963-09-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-09-07 | 1967-03-09 | 1967-09-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-09-07 | 1971-03-09 | 1971-09-08 | $7700.00 | Window Closed / Lapsed |