US3796542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Use of multi-purpose centrifuge tube in biological analysis
Assignee: Medical Evaluation Devices and Instruments Corp
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Filing: 1971-12-13
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Granted: 1974-03-12
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Expires: 1991-12-13
Abstract
Abstract A multipurpose molded centrifuge tube formed from that type of plastic that is transparent upon completion of molding and includes a body shaped as a bellows-folded helix having a closed bottom and a syringe tip at its top. The tube is used to collect, centrifuge and dispense liquid specimens as incidents to laboratory test procedures; and the transparency of the tube additionally enables its use when exposed to heat for the visual qualitative determination of the presence of certain theretofore undisclosed compounds in the liquid specimen, such as albumin in urinanalysis.
Inventors
- 👤 W Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 13:15
CPC Classifications
A; A61; A61B; A61B10/00; A61B10/02; A61B10/0291; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021; G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/07; Y; Y10; Y10S; Y10S385/00; Y10S385/901; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/2575
Claims Analysis
Total Claims: 0
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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) | 1977-03-11 | 1977-09-10 | 1978-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-11 | 1981-09-10 | 1982-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-11 | 1985-09-10 | 1986-03-12 | $7700.00 | Window Closed / Lapsed |