Patent US4428323A successfully refreshed from Google Patents.
US4428323A
Expired / Lapsed
US
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Chamber block having a sample dam and a supernatant reentry barrier therein
Assignee: EIDP Inc
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Filing: 1982-11-22
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Granted: 1984-01-31
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Expires: 2002-11-22
Abstract
Abstract A chamber block for a centrifuge has a sample inlet channel at the lower end of which is disposed a dam to prevent run-through of a sample, and barrier to prevent re-entry of supernatant from a supernatant collection vial into the block.
Inventors
- 👤 John R. Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 03:33
CPC Classifications
B; B04; B04B; B04B5/00; B04B5/04; B04B5/0407
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
96 words
In a chamber block adapted for removable insertion into a centrifuge rotor, the block being of the type having an inlet channel into which a sample is introduced and an outlet channel through which the sample moves in response to a centrifugal force field toward a deposition surface, wherein the improvement comprises: a dam formed within the block and cooperating with the structure of the block to define a well on the interior thereof to receive the sample and to prevent the sample from flowing through the block in the absence of a centrifugal force field.
Claim 2
Dependent Claim
96 words
In a chamber block adapted for removable insertion into a centrifuge rotor, the block being of the type having an inlet channel into which a sample is introduced and an outlet channel through which the sample moves in response to a centrifugal force field toward a deposition surface, wherein the improvement comprises: a dam formed within the block and cooperating with the structure of the block to define a well on the interior thereof to receive the sample and to prevent the sample from flowing through the block in the absence of a centrifugal force field.
Claim 3
Dependent Claim
18 words
The chamber block of claim 1 wherein the surface of the dam presented to the well is inclined.
Claim 4
Dependent Claim
95 words
The chamber block of claim 1 wherein the sample includes particles suspended in a supernatant, the block having a conduit through which the supernatant is withdrawn from the region of the deposition surface, the block having a retaining arrangement adapted to receive a supernatant collection vial thereon and a baffle to deflect supernatant withdrawn through the conduit into the collection vial, wherein the improvement further comprises: a barrier formed within the block and arranged to inhibit flow of supernatant from the vial into the conduit while the block is subjected to a centrifugal force field.
Claim 5
Dependent Claim
18 words
The chamber block of claim 3 wherein the surface of the dam presented to the well is inclined.
References Cited (Backward Citations)
US1751982A
Cited
US2233855A
Cited
US2654536A
Cited
US4314523A
Cited
US4306514A
Cited
US4327661A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |