US3635345A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chromatography
Assignee: Individual
•
Filing: 1969-03-13
•
Granted: 1972-01-18
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Expires: 1989-03-13
Abstract
Abstract A thin line chromatography dispenser having an elongated, flexible capillary tube which is supported over an adsorbent surface such that the angle between the surface and the tube is substantially less than 90*. The angle is made as small as practicable, and preferably is less than 20*. Means are provided for moving the tube over the adsorbent surface so that liquid can be discharged onto the surface in a thin straight line.
Inventors
- 👤 Jerome A Rodder
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 06:29
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/91; Y; Y10; Y10T; Y10T137/00; Y10T137/8593; Y10T137/85978; Y10T137/86035; Y10T137/86043; Y10T137/86381
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
257 words
Apparatus for depositing a layer of liquid on a path having a beginning and an end along the surface of an adsorbent, the apparatus comprising an elongated tube with one end disposed adjacent the surface, means responsive to the said one end of the tube being adjacent the beginning of the path for moving the tube toward the surface until the said one end of the tube contacts it at the beginning of the path and the angle between the surface and the tube is less than 20*, means for moving the surface and tube relative to each other in a first direction so the said end of the tube traces a path on the surface in the direction in which the tube extends from the surface, means for applying force to a liquid in the tube to force the liquid from the tube and leave a first liquid layer on the path, means responsive to the said end of the tube reaching the end of the path for lifting the said end of the tube from the surface, means for removing force on the liquid to interrupt its flow from the tube while the said end is out of contact with the surface, means for reversing the relative movement of the tube and surface while they are out of contact with each other, means for stopping the said reverse movement when the said end of the tube is adjacent the beginning of the path so a second layer of liquid can be deposited on the first.
Claim 2
Dependent Claim
257 words
Apparatus for depositing a layer of liquid on a path having a beginning and an end along the surface of an adsorbent, the apparatus comprising an elongated tube with one end disposed adjacent the surface, means responsive to the said one end of the tube being adjacent the beginning of the path for moving the tube toward the surface until the said one end of the tube contacts it at the beginning of the path and the angle between the surface and the tube is less than 20*, means for moving the surface and tube relative to each other in a first direction so the said end of the tube traces a path on the surface in the direction in which the tube extends from the surface, means for applying force to a liquid in the tube to force the liquid from the tube and leave a first liquid layer on the path, means responsive to the said end of the tube reaching the end of the path for lifting the said end of the tube from the surface, means for removing force on the liquid to interrupt its flow from the tube while the said end is out of contact with the surface, means for reversing the relative movement of the tube and surface while they are out of contact with each other, means for stopping the said reverse movement when the said end of the tube is adjacent the beginning of the path so a second layer of liquid can be deposited on the first.
Claim 3
Dependent Claim
32 words
Apparatus according to claim 1 in which the tube is placed in contact with the surface with a sufficient force to give the tube a slight concave curvature away from the surface.
Claim 4
Dependent Claim
23 words
Apparatus according to claim 1 in which the angle between the surface and the tube is between about 3* and about 20* .
Claim 5
Dependent Claim
21 words
Apparatus according to claim 1 which includes means for adjusting the angle between the tube and the surface of the adsorbent.
Claim 6
Dependent Claim
63 words
Apparatus according to claim 1 which includes means for applying gas pressure to the liquid in the tube when the surface and the tube move relative to each other in the first direction, and means for decreasing the gas pressure on the liquid in the tube when the surface and tube move relative to each other in the direction opposite to the first.
References Cited (Backward Citations)
US3150001A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |