Patent US4756883A successfully refreshed from Google Patents.
US4756883A
Expired / Lapsed
US
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Analysis device
Assignee: EIDP Inc
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Filing: 1986-09-16
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Granted: 1988-07-12
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Expires: 2006-09-16
Abstract
Abstract A centrifugal analysis device is provided in which a plastic rotor has peripheral cells each containing a reagent. The rotor is configured such that sample fluid within a central receptacle is equally dispensed to each of the peripheral cells. An outlet orifice is positioned at a radial distance greater than the inlet orifice to each cell such that each cell is permitted (1) to be completely filled with fluid and (2) simultaneously such that all reactions take place at the same beginning point.
Inventors
- 👤 William A. Romanauskas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 15:57
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/07; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/111666
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
177 words
In a centrifugal device for analyzing a liquid sample comprising a rotor having an axis of rotation, a central receptacle and a plurality of peripheral cells, each of the cells having two walls for optical measurement, being adapted to hold a reagent, having fluid communication means for providing fluid communication between the cell and the central receptacle, having inner and outer radially spaced wall portions, and having leading and trailing wall portions when the rotor is rotated one direction about the axis of rotation, the improvement wherein the fluid communication means between the cells and the central receptacle is provided by a liquid inlet orifice in the inner wall portion of each of the cells, each of the cells is provided with an air outlet orifice partially in the leading wall portion at a point at a greater radial distance from the axis of rotation than the inlet orifices and substantially spaced from the outer wall portion, and each of the air outlet orifices comprises passage means for passing air from the cells to the central receptacle.
Claim 2
Dependent Claim
177 words
In a centrifugal device for analyzing a liquid sample comprising a rotor having an axis of rotation, a central receptacle and a plurality of peripheral cells, each of the cells having two walls for optical measurement, being adapted to hold a reagent, having fluid communication means for providing fluid communication between the cell and the central receptacle, having inner and outer radially spaced wall portions, and having leading and trailing wall portions when the rotor is rotated one direction about the axis of rotation, the improvement wherein the fluid communication means between the cells and the central receptacle is provided by a liquid inlet orifice in the inner wall portion of each of the cells, each of the cells is provided with an air outlet orifice partially in the leading wall portion at a point at a greater radial distance from the axis of rotation than the inlet orifices and substantially spaced from the outer wall portion, and each of the air outlet orifices comprises passage means for passing air from the cells to the central receptacle.
Claim 3
Dependent Claim
27 words
A device as set forth in claim 1 wherein each of the inlet orifices is located continguous the trailing portion of a different one of the cells.
Claim 4
Dependent Claim
27 words
A device as set forth in claim 2 wherein each of the outlet orifices is located continguous the leading portion of a different one of the cells.
Claim 5
Dependent Claim
55 words
A device as set forth in claim 3 wherein each of the outlet orifices is defined partially by a septum having a groove extending radially inward into the central receptacle, whereby adjacent septa partially define separate wells for each of the cells extending into the central receptacle to reduce liquid rotation within the central receptacle.
Claim 6
Dependent Claim
25 words
A device as set forth in claim 4 wherein the inlet and outlet orifices are capillary sized to retain liquid in the cells after filling.
Claim 7
Dependent Claim
25 words
A device as set forth in claim 5 wherein the inlet and outlet orifices are located at a top end of each of the cells.
Claim 8
Dependent Claim
17 words
A device as set forth in claim 5 wherein the inlet and outlet orifices have hydrophobic surfaces.
Claim 9
Dependent Claim
55 words
A device as set forth in claim 5 wherein the rotor comprises top and bottom pieces , the bottom piece having vertical partitions comprising the leading and trailing wall portions and the septa , the inlet and outlet orifices being defined by grooves formed in the partitions and a lower surface of the top piece.
Claim 10
Dependent Claim
27 words
A device as set forth in claim 1 wherein each of the outlet orifices is located contiguous the leading portion of a different one of the cells.
Claim 11
Dependent Claim
55 words
A device as set forth in claim 9 wherein each of the outlet orifices is defined partially by a septum having a groove extending radially inward into the central receptacle, whereby adjacent septa partially define separate walls for each of the cells extending into the central receptacle to reduce liquid rotation within the central receptacle.
Claim 12
Dependent Claim
55 words
A device as set forth in claim 10 wherein the rotor comprises top and bottom pieces , the bottom piece having vertical partitions comprising the leading and trailing wall portions and the septa , the inlet and outlet orifices being defined by grooves formed in the partitions and a lower surface of the top piece.
Claim 13
Dependent Claim
22 words
A device as set forth in claim 1 wherein the air outlet orifices are adjacent the inner wall portions of the cells.
Claim 14
Dependent Claim
31 words
A device as set forth in claim 1 wherein the air outlet orifices are immediately adjacent junction points of the inner wall portions and the leading wall portions of the cells.
References Cited (Backward Citations)
US3555284A
Cited
US3744975A
Cited
US3798459A
Cited
US3873217A
Cited
DE2529245A1
Cited
US4123173A
Cited
US4154793A
Cited
US4244916A
Cited
US4284602A
Cited
EP0039825A1
Cited
CA1152353A
Cited
US4387164A
Cited
EP0052770A1
Cited
EP0052769A1
Cited
EP0062907A1
Cited
US4469793A
Cited
FR2506015A1
Cited
US4588555A
Cited
US4470954A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |