US3707137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thin layer chromatography coating device
Assignee: Roche Diagnostics GmbH
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Filing: 1970-04-20
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Granted: 1972-12-26
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Expires: 1990-04-20
Abstract
Abstract Coating device for applying thin layers of uniform and defined thickness of adsorption agent onto chromatography plates comprising two vertical side members, two connecting parts affixed thereto, the connecting parts being mounted at an angle to each other to form a trough with a slit at the bottom thereof to permit slow flow-through of coating material, the height difference between the lower edges of the connecting parts and side members, respectively, defining the thickness of the coating applied.
Inventors
- 👤 Dieter Jaworek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 21:43
CPC Classifications
G; G01; G01N; G01N30/00; G01N30/90; G01N30/92; G01N30/93
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
128 words
Coating device for thin layer chromatography comprising two substantially vertically disposed rigidly mounted side parts and two vertical connecting parts affixed thereto, and a third connecting part arranged therebetween at an angle of 40*-50* to the vertical, said third connecting part forming an outlet slit with each of the two said vertical connecting parts, the breadth of which said slits permitting a slow flowthrough of coating material, guide strips being provided on each upper and lower edge of the side parts, and the lower edges of all connecting parts being constructed as coating edges, the difference in height between the lower edges of the connecting parts and the lower edges of the side parts determining the thickness of the coating to be applied to a substrate or plate.
Claim 2
Dependent Claim
128 words
Coating device for thin layer chromatography comprising two substantially vertically disposed rigidly mounted side parts and two vertical connecting parts affixed thereto, and a third connecting part arranged therebetween at an angle of 40*-50* to the vertical, said third connecting part forming an outlet slit with each of the two said vertical connecting parts, the breadth of which said slits permitting a slow flowthrough of coating material, guide strips being provided on each upper and lower edge of the side parts, and the lower edges of all connecting parts being constructed as coating edges, the difference in height between the lower edges of the connecting parts and the lower edges of the side parts determining the thickness of the coating to be applied to a substrate or plate.
Claim 3
Dependent Claim
19 words
Coating device according to claim 1 wherein the side parts and connecting parts are made of a synthetic resin.
Claim 4
Dependent Claim
12 words
Coating device according to claim 2 wherein the synthetic resin is transparent.
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) | 1975-12-26 | 1976-06-26 | 1976-12-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-26 | 1980-06-26 | 1980-12-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-26 | 1984-06-26 | 1984-12-26 | $7700.00 | Window Closed / Lapsed |