US3752146A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge tube for ultra-violet analysis
Assignee: Medical Evaluation Devices and Instruments Corp
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Filing: 1971-12-13
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Granted: 1973-08-14
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Expires: 1991-12-13
Abstract
Abstract This invention is directed to a centrifuge tube formed from a transparent plastic and provided at its bottom with a penetratable membrane through which an optical fiber element is passed upon completion of centrifuging of the contents to enable visual observation of the effect of light, particularly ultraviolet light, on the contents, when compared with a standard or control, to detect the presence or absence of a predetermined type of foreign matter in the centrifuged contents of the tube. The optical fiber element may be formed from quartz or from such a material as a methyl methacrylate capable of transmitting ultra-violet light.
Inventors
- 👤 W Kline
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:59
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: 9
Claim 1
Independent Claim
110 words
A molded centrifuge tube formed from that type of plastic that is transparent upon completion of molding and including; a hollow body shaped as a bellows-folded helix, said body having a bottom closure provided with a needle-penetrable membrane and having a top provided with an axially extending hollow tip in open communication with the interior of said body, and an optical fiber element passing through said penetrable membrane with its inner end extending into the lower interior portion of said body and its outer end extending outwardly beyond said membrane for operable connection with an external source of light for transmission of said light into the interior of said body.
Claim 2
Dependent Claim
110 words
A molded centrifuge tube formed from that type of plastic that is transparent upon completion of molding and including; a hollow body shaped as a bellows-folded helix, said body having a bottom closure provided with a needle-penetrable membrane and having a top provided with an axially extending hollow tip in open communication with the interior of said body, and an optical fiber element passing through said penetrable membrane with its inner end extending into the lower interior portion of said body and its outer end extending outwardly beyond said membrane for operable connection with an external source of light for transmission of said light into the interior of said body.
Claim 3
Dependent Claim
31 words
The centrifuge tube of claim 1 in which said body is formed from a plastic having a memory whereby to return to its normal configuration after having been physically distorted therefrom.
Claim 4
Dependent Claim
21 words
The centrifuge tube of claim 2 in which said plastic is selected from the group consisting of polyethylene, polypropylene and polyurethane.
Claim 5
Dependent Claim
35 words
The centrifuge tube of claim 1 in which the bottom of said body is tapered by two diametrically opposed concave hollows that define abutments for properly positioning said tube during centrifuging or other mechanical operations.
Claim 6
Dependent Claim
22 words
The centrifuge tube of claim 1 in which said optical fiber element is made from a material capable of transmitting ultra-violet light.
Claim 7
Dependent Claim
32 words
The centrifuge tube of claim 5 in which the material for said optical fiber element is selected from the group consisting of quartz, and a methyl methacrylate capable of transmitting ultra-violet light.
Claim 8
Dependent Claim
14 words
The centrifuge tube of claim 5 in which said optical fiber element is solid.
Claim 9
Dependent Claim
20 words
The centrifuge tube of claim 5 in which said optical fiber element is in the form of a hollow needle.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |