US3254479A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stacked plate chromatographic column
Assignee: University of California Berkeley
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Filing: 1962-07-02
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Granted: 1966-06-07
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Expires: 1982-07-02
Abstract
No abstract record available.
Inventors
- 👤 John D Goeschl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:45
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6052; G01N30/6073; G01N30/6078; G01N30/88; G01N2030/8881
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
A CHROMATOGRAPHIC COLUMN COMPRISING: A STACK OF PLATES, EACH PROVIDED ON ONE SIDE THEREOF WITH A HELICAL GROOVE, ONE END OF THE GROOVE ON EACH PLATE BEING IN VERTICAL REGISTRATION AND IN COMMUNICATION WITH THE CORRESPONDING END OF THE GROOVE IN ONE OF THE NEXT ADJACENT PLATE SO AS TO FORM A CONTINUOUS CHROMATOGRAPHIC CHANNEL; END PLATES DISPOSED OVER THE TERMINAL PLATES OF SAID STACK OF PLATES, MEANS FOR CLAMPING ALL OF SAID PLATES TIGHTLY TOGETHER SO AS TO MAINTAIN THE CONTACTING SURFACES THEREOF IN GAS-TIGHT ENGAGEMENT WITH EACH OTHER; A CONDUIT PROVIDED ON ONE OF SAID END PLATES COMMUNICATING WITH ONE END OF SAID CHANNEL; A TWO-WAY VALVE PROVIDED ON THE OTHER OF SAID END PLATES AND MEANS FOR SELECTIVELY ESTABLISHING COMMUNICATION BETWEEN ONE SIDE OF SAID VALVE AND THE OUTER AND INNER ENDS OF SAID GROOVE IN SAID GROOVED PLATE IMMEDIATELY UNDERLYING SAID OTHER END PLATE.
Claim 2
Dependent Claim
148 words
A CHROMATOGRAPHIC COLUMN COMPRISING: A STACK OF PLATES, EACH PROVIDED ON ONE SIDE THEREOF WITH A HELICAL GROOVE, ONE END OF THE GROOVE ON EACH PLATE BEING IN VERTICAL REGISTRATION AND IN COMMUNICATION WITH THE CORRESPONDING END OF THE GROOVE IN ONE OF THE NEXT ADJACENT PLATE SO AS TO FORM A CONTINUOUS CHROMATOGRAPHIC CHANNEL; END PLATES DISPOSED OVER THE TERMINAL PLATES OF SAID STACK OF PLATES, MEANS FOR CLAMPING ALL OF SAID PLATES TIGHTLY TOGETHER SO AS TO MAINTAIN THE CONTACTING SURFACES THEREOF IN GAS-TIGHT ENGAGEMENT WITH EACH OTHER; A CONDUIT PROVIDED ON ONE OF SAID END PLATES COMMUNICATING WITH ONE END OF SAID CHANNEL; A TWO-WAY VALVE PROVIDED ON THE OTHER OF SAID END PLATES AND MEANS FOR SELECTIVELY ESTABLISHING COMMUNICATION BETWEEN ONE SIDE OF SAID VALVE AND THE OUTER AND INNER ENDS OF SAID GROOVE IN SAID GROOVED PLATE IMMEDIATELY UNDERLYING SAID OTHER END PLATE.
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) | 1969-06-06 | 1969-12-06 | 1970-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-06 | 1973-12-06 | 1974-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-06 | 1977-12-06 | 1978-06-07 | $7700.00 | Window Closed / Lapsed |