US4883688A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for producing chromatographic devices having modified edges
Assignee: Siemens Healthcare Diagnostics GmbH Germany
•
Filing: 1988-07-05
•
Granted: 1989-11-28
•
Expires: 2008-07-05
Abstract
Abstract A device and a method for producing the device for use in a chromatographic system wherein a component of a mixture is partitioned is comprised of a chromatographic material. In the chromatographic system the component traverses at least a portion of the chromatographic material. The device generally has at least one longitudinal edge substantially corresponding to the direction of traverse of the component. The longitudinal edge is modified to control the shape of the fron t of the traversing component by introducing along the edge either a plurality of indentations or a chemical substance.
Inventors
- 👤 Thomas M. Houts
- 👤 Edwin F. Ullman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 13:01
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/92; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0524; Y10T83/0538; Y10T83/0548; Y10T83/0558
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
A method for producing a device comprised of chromatographic material having a longitudinal edge, which comprises introducing a pluality of indentations along the longitudinal edge of said material, the number, configuration, and dimensions of said indentations being sufficient to render the front of a component traversing said chromatographic material substantially flat or convex.
Claim 2
Independent Claim
53 words
A method for producing a device comprised of chromatographic material having a longitudinal edge, which comprises introducing a pluality of indentations along the longitudinal edge of said material, the number, configuration, and dimensions of said indentations being sufficient to render the front of a component traversing said chromatographic material substantially flat or convex.
Claim 3
Independent Claim
66 words
A method for producing a device comprised of chromatographic material having a longitudinal edge, which comprises introducing a chemical substance along the longitudinal edge of said material, said substances being capable of reducing the rate of migration of a component traversing said chromatographic material, the amount of said substance being sufficeint to render the front of a component traversing said chromatographic material substantially flat or convex.
Claim 4
Independent Claim
66 words
A method for producing a device comprised of chromatographic material having a longitudinal edge, which comprises introducing a chemical substance along the longitudinal edge of said material, said substances being capable of reducing the rate of migration of a component traversing said chromatographic material, the amount of said substance being sufficeint to render the front of a component traversing said chromatographic material substantially flat or convex.
Claim 5
Dependent Claim
13 words
The method of claim 2 wherein said chemical substance is hydrophobic or polymeric.
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) | 1992-11-27 | 1993-05-29 | 1993-11-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-11-27 | 1997-05-29 | 1997-11-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-11-27 | 2001-05-29 | 2001-11-28 | $7700.00 | Window Closed / Lapsed |