Patent US4364903A successfully refreshed from Google Patents.
US4364903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contamination-free separation device
Assignee: Becton Dickinson and Co
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Filing: 1981-04-02
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Granted: 1982-12-21
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Expires: 2001-04-02
Abstract
Abstract An arrangement of separation device is provided such that after centrifugation, for example, the heavy materials at the bottom of the separation container may be directly removed from the bottom without first having to decant or otherwise remove the lighter fraction at the upper end of the container. The arrangement may include, for example, a conventional tube-type container modified to have an opening in the bottom. A specially configured plug or stopper is utilized in combination with the container bottom opening to seal the opening closed, which plug is configured to complete the bottom end of the container and to provide an access septum for needle penetration in the bottom of the container. The arrangement of the plug prevents displacement thereof, once it is properly positioned, and includes specifically, a locking detent to prevent the plug from being displaced inwardly upon insertion of a needle into the plug.
Inventors
- 👤 Gilbert S. Bittings
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:34
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
198 words
Apparatus for securing the heavy fraction from a separation tube without disturbing the lighter fraction, characterized by (a) a tube body having a top opening and a bottom opening; (b) said tube body having an annular vertical first wall portion; (c) a second wall portion integral with said first wall portion; (d) said second wall portion converging from the bottom edge of said first wall portion to said bottom opening; (e) a plug for said tube bottom opening extending through said bottom opening; (f) said plug comprising (1) an annular upper wall portion the top surface of said annular upper wall portion diverging from the outer surface of said upper wall portion toward the axis of said plug; (2) an annular lower wall portion integral with said upper wall portion and converging downwardly from said upper wall portion; (3) said upper wall portion and said lower wall portion defining a heavy fraction receiving cup in said plug; (4) a locking detent in said annular lower wall portion for engaging the bottom surface of said tube body second wall portion; and (5) the lower end of said annular lower wall portion defining a needle receiving septum in said plug.
Claim 2
Dependent Claim
198 words
Apparatus for securing the heavy fraction from a separation tube without disturbing the lighter fraction, characterized by (a) a tube body having a top opening and a bottom opening; (b) said tube body having an annular vertical first wall portion; (c) a second wall portion integral with said first wall portion; (d) said second wall portion converging from the bottom edge of said first wall portion to said bottom opening; (e) a plug for said tube bottom opening extending through said bottom opening; (f) said plug comprising (1) an annular upper wall portion the top surface of said annular upper wall portion diverging from the outer surface of said upper wall portion toward the axis of said plug; (2) an annular lower wall portion integral with said upper wall portion and converging downwardly from said upper wall portion; (3) said upper wall portion and said lower wall portion defining a heavy fraction receiving cup in said plug; (4) a locking detent in said annular lower wall portion for engaging the bottom surface of said tube body second wall portion; and (5) the lower end of said annular lower wall portion defining a needle receiving septum in said plug.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1, further characterized by (a) the outer surface of the lower half of said annular lower wall portion of said plug is offset from the upper half outer surface thereof to define said locking detent.
Claim 4
Dependent Claim
29 words
The apparatus of claim 1, further characterized by (a) said annular lower wall portion of said plug ends in a planar surface defining said septum area in said plug.
Claim 5
Dependent Claim
15 words
The apparatus of claim 1, further characterized by (a) a cap for said top opening.
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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |