US3298527A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatographic flow column
Assignee: Individual
•
Filing: 1965-05-17
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Granted: 1967-01-17
•
Expires: 1985-05-17
Abstract
No abstract record available.
Inventors
- 👤 Wright John Lemon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 14:32
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/02; G01N30/60; G01N30/6004; G01N30/603; G01N30/6034; G01N30/6043; G01N30/6052; G01N30/6069
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
125 words
A FLOW COLUMN ADAPTED TO RECEIVE A MOVING PHASE FLUID AND A SAMPLE COMPONENT AND COMPRISING A METALLIC TUBULAR MEMBER, SAID TUBULAR MEMBER CONTAINING A GRANULAR PACKING MATERIAL, A STATIONARY PHASE MATERIAL LOCATED ON AND COATING THE EXTERIOR SURFACE OF THE PACKING MATERIAL, MEANS MOUNTED WITHIN SAID TUBULAR MEMBER TO PROVIDE EVEN HEAT DISTRIBUTION AND UNIFORM CONCENTRATIONS WITHIN THE MOVING PHASE MATERIAL AND STATIONARY PHASE MATERIAL AND TO PROVIDE UNIFORM FLOW RESISTANCE TO THE MOVING PHASE MATERIAL, SAID MEANS COMPRISING FIN MEMBERS MOUNTED ON THE INNER WALL OF SAID TUBULAR MEMBER AT EVENLY SPACED INTERVALS AND EXTENDING RADIALLY AND LONGITUDINALLY THERETHROUGH, SAID FIN MEMBERS BEING OF UNIFORM CROSS-SECTIONAL THICKNESS AND THE RADIAL DIMENSION OF CERTAIN OF THE FIN MEMBERS BEING GREATER THAN THAT OF OTHERS.
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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) | 1970-01-16 | 1970-07-18 | 1971-01-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-16 | 1974-07-18 | 1975-01-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-16 | 1978-07-18 | 1979-01-17 | $7700.00 | Window Closed / Lapsed |