US3718436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Immuno diffusion cell
Assignee: Cordis Corp
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Filing: 1971-11-11
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Granted: 1973-02-27
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Expires: 1991-11-11
Abstract
Abstract A two-directional immuno diffusion (ouchterlony) cell features a gel layer and an overlying template having wells for the reactants. One of the wells is in the form of an enclosed peripheral channel and the other is eccentric, such that diffusion of the respective reactants from the wells results in an elliptical reaction figure, the geometry and rate of formation of which are functions of the reactant concentrations and relative proportions.
Inventors
- 👤 A Ushakoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:00
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/558; G01N33/559; Y; Y10; Y10S; Y10S435/00; Y10S435/975; Y10S436/00; Y10S436/807; Y10S436/809
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
An immuno diffusion cell comprising a flat basemember, a gel layer supported on said base member and a template overlying and contacting said gel layer, said template being formed with a circular channel adjacent said gel layer defining therewith an open annulus adapted to retain a first liquid reactant in contact with said gel layer and also being formed with a well surrounded by and eccentric of said channel adjacent said gel layer and adapted to retain a second liquid reactant in contact with said gel layer.
References Cited (Backward Citations)
US3554704A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |