US4461185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection needle
Assignee: PE Manufacturing GmbH
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Filing: 1982-10-28
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Granted: 1984-07-24
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Expires: 2002-10-28
Abstract
Abstract A needle, for use in withdrawing a liquid sample from sample vessels closed by self-sealing diaphragms, includes a capillary tube 12 turned inwardly at its end. The end thereof is tapered conically at the inside as well as at the outside.
Inventors
- 👤 Rainer Schoffel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:46
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1079; B; B01; B01L; B01L3/00; B01L3/02; B01L3/021; G01N1/00; G01N1/02; G01N1/10
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
90 words
Needle for use in withdrawing a liquid sample from a closed sample vessel having a self-sealing diaphragm, said needle comprising: a capillary tube having an aperture at one end thereof, which aperture communicates with a longitudinal passage through said tube, said one end being conically tapered at the outside, the interior of said capillary tube being conically tapered at said one end, said taper having a conus angle of about 22° and being such that the diameter of said aperture is about equal to half the diameter of said passage.
Claim 2
Dependent Claim
90 words
Needle for use in withdrawing a liquid sample from a closed sample vessel having a self-sealing diaphragm, said needle comprising: a capillary tube having an aperture at one end thereof, which aperture communicates with a longitudinal passage through said tube, said one end being conically tapered at the outside, the interior of said capillary tube being conically tapered at said one end, said taper having a conus angle of about 22° and being such that the diameter of said aperture is about equal to half the diameter of said passage.
Claim 3
Dependent Claim
17 words
Needle as claimed in claim 1 wherein said capillary tube is turned inwardly at said one end.
References Cited (Backward Citations)
US3754434A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-07-24 | 1988-01-23 | 1988-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-07-24 | 1992-01-23 | 1992-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-07-24 | 1996-01-23 | 1996-07-24 | $7700.00 | Window Closed / Lapsed |