US4135884A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gamma stick
Assignee: Individual
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Filing: 1977-08-29
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Granted: 1979-01-23
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Expires: 1997-08-29
Abstract
Abstract A test stick, usable in clinical assays, is adapted to be inserted in a test tube that contains antigen solution. The stick comprises: (a) an elongated plastic member having a test portion adapted to be inserted into said solution in the test tube, (b) said test portion defining surface area at least about as great as the test tube bore surface extending about said test portion, (c) said test portion adapted to be coated with antibody to contact said solution.
Inventors
- 👤 James T. Shen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 20:58
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/543; G01N33/54366; Y; Y10; Y10S; Y10S435/00; Y10S435/97; Y10S436/00; Y10S436/807; Y10S436/81
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
197 words
For use in clinical assays, the combination comprising a test tube and a test stick inserted in the test tube that contains antigen solution, the tube having an upwardly concave bottom wall the stick comprising (a) an elongated plastic member having a test portion inserted into said solution in the test tube, (b) said test portion defining surface area at least about as great as the test tube bore surface extending about said test portion, (c) said test portion coated with antibody to contact said solution, (d) said test portion defining multiple flutes arranged in opposed pairs, each such pair having lowermost edges which are downwardly generally convex in matching relation to the upward concavity of said tube bottom wall, (e) the uppermost extent of the stick projecting upwardly from the uppermost top level of the tube when said flute lowermost edges are adjacent the tube bottom wall, (f) said member having opposed parallel faces and being flat above the level of the flutes, two of said flutes having opposite surfaces in the same planes as are defined by said opposed parallel faces, (g) said stick being narrowed in width between said uppermost extent and said flutes.
Claim 2
Dependent Claim
197 words
For use in clinical assays, the combination comprising a test tube and a test stick inserted in the test tube that contains antigen solution, the tube having an upwardly concave bottom wall the stick comprising (a) an elongated plastic member having a test portion inserted into said solution in the test tube, (b) said test portion defining surface area at least about as great as the test tube bore surface extending about said test portion, (c) said test portion coated with antibody to contact said solution, (d) said test portion defining multiple flutes arranged in opposed pairs, each such pair having lowermost edges which are downwardly generally convex in matching relation to the upward concavity of said tube bottom wall, (e) the uppermost extent of the stick projecting upwardly from the uppermost top level of the tube when said flute lowermost edges are adjacent the tube bottom wall, (f) said member having opposed parallel faces and being flat above the level of the flutes, two of said flutes having opposite surfaces in the same planes as are defined by said opposed parallel faces, (g) said stick being narrowed in width between said uppermost extent and said flutes.
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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |