Patent US5050859A successfully refreshed from Google Patents.
Patent US3734693A successfully refreshed from Google Patents.
US3734693A
Expired / Lapsed
US
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Apparatus for drying and developing chromatograms
Assignee: SORVALL I INC US
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Filing: 1971-08-09
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Granted: 1973-05-22
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Expires: 1991-08-09
Abstract
Abstract SAID HEATING ELEMENT. THE APPARATUS COMPRISES READILY ASSEMBLED AND DISASSEMBLED COMPONENTS WHICH ARE CORROSION-RESISTANT AND ARE EASILY CLEANED. APPARATUS AND METHOD FOR BOTH DRYING A D DEVELOPING CHROMATOGRAMS SAFELY IN A SINGLE EQUIPMENT INTO WHICH THEY ARE REMOVABLE INSERTED AND PROCESSED WITHIN A CONFINED HEAT CONTROLLED ENCOLSURE. A FEATURE OF THE INVENTION IS THE PROVISION OF AN ELONGATED HEATING ELEMENT SUPPORTED AT ONE END BY A BLOCK AND A REMOVABLE TUBULAR ENCLOSURE ALSO SUPPORTED BY SAID BLOCK AND FORMING A HEATING CHAMBER AROUND SAID HEATING ELEMENT. SPRING MEANS ARE PROVIDED FOR RELEASEABLY SECURING SAID TUBULAR ELEMENT AROUND
Inventors
- 👤 D Petcoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:30
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/94
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-05-21 | 1976-11-20 | 1977-05-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-05-21 | 1980-11-20 | 1981-05-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-05-21 | 1984-11-20 | 1985-05-22 | $7700.00 | Window Closed / Lapsed |