US4358425A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Penetrable centrifuge tube
Assignee: Beckman Coulter Inc
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Filing: 1981-02-17
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Granted: 1982-11-09
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Expires: 2001-02-17
Abstract
Abstract A transparent tube for use in the cavity of the rotor of a high speed centrifuge. The tube is penetrable at its bottom end by a needle of a hypodermic syringe. The tube is open at the top and has a rounded bottom with an opening forming a passageway therein. A recess forming a shoulder co-axial with the passageway is provided both on the inner side and the outer side of the tube. A resilient plug having flanges at each end provides a tight fitting closure for the passageway and recesses.
Inventors
- 👤 Jack P. Finney
- 👤 Kenzo Ishimaru
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:17
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5021
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
158 words
A transparent centrifuge tube for use in the cavity of the rotor of a high speed centrifuge, and having a bottom penetrable by the needle of a hypodermic syringe comprising: a cylindrical tube open at the top and having a rounded bottom; a passageway in the bottom of said tube; said passageway including a recess, on the inner side of the tube; said recess on the inner side of the tube including a shoulder having an inverted conical shape; said passageway also including a recess on the outer side of the tube; said recess on the outer side of the tube including a shoulder co-axial with respect to said passageway; a resilient plug disposed in said passageway providing a tight fitting closure therefor; said plug having a round central body; an inverted conical flange connecting with the upper end of said round central body; and a disc-shaped flange connecting with the lower end of said round central body.
Claim 2
Dependent Claim
158 words
A transparent centrifuge tube for use in the cavity of the rotor of a high speed centrifuge, and having a bottom penetrable by the needle of a hypodermic syringe comprising: a cylindrical tube open at the top and having a rounded bottom; a passageway in the bottom of said tube; said passageway including a recess, on the inner side of the tube; said recess on the inner side of the tube including a shoulder having an inverted conical shape; said passageway also including a recess on the outer side of the tube; said recess on the outer side of the tube including a shoulder co-axial with respect to said passageway; a resilient plug disposed in said passageway providing a tight fitting closure therefor; said plug having a round central body; an inverted conical flange connecting with the upper end of said round central body; and a disc-shaped flange connecting with the lower end of said round central body.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-11-08 | 1986-05-10 | 1986-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-11-08 | 1990-05-10 | 1990-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-11-08 | 1994-05-10 | 1994-11-09 | $7700.00 | Window Closed / Lapsed |