US5141875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary fluid manipulator
Assignee: Medtox Scientific Inc
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Filing: 1990-11-16
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Granted: 1992-08-25
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Expires: 2010-11-16
Abstract
Abstract A rotary fluid manipulator utilizable as a diagnostic device includes a porous body having fluid passages defined therein by fluid blocking means in the porosities of the body such as openings or slots in the body or compaction of areas of the porous body to define fluid passages therebetween. Various substances or binding partners such as receptors, immunoassay or other assay test materials and test specimens can be deposited on the porous body to permit various types of tests to be made by rotation of the manipulator to cause conjunctive centrifugal and wicking induced flow of fluids deposited thereupon.
Inventors
- 👤 Arden A. Kelton
- 👤 Michael L. Bell
- 👤 Roy A. Chung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 18:22
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; G01N21/07; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5023; B01L2300/00; B01L2300/08; B01L2300/0803; B01L2300/0861; B01L2300/0864; B01L2400/00; B01L2400/04; B01L2400/0403; B01L2400/0406; B01L2400/0409; B01L3/5025; Y; Y10; Y10S; Y10S435/00; Y10S435/805; Y10S435/97; Y10S435/971; Y10S435/973; Y10S436/00; Y10S436/807; Y10S436/809; Y10T; Y10T436/00; Y10T436/11; Y10T436/111666
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
98 words
An assay for diagnostic purposes comprising applying a specimen to a body having wicking characteristics, said body having thereon at least two reagents positioned on said body such that at least a portion of said specimen when applied to said body contacts sequentially one of said at least two reagents and then contacts a second of said at least two reagents, whereby said at least a portion of the specimen is driven to sequentially contact said at least two reagents, and then determining the results of the assay in the last of said at least two reagent positions.
Claim 2
Dependent Claim
98 words
An assay for diagnostic purposes comprising applying a specimen to a body having wicking characteristics, said body having thereon at least two reagents positioned on said body such that at least a portion of said specimen when applied to said body contacts sequentially one of said at least two reagents and then contacts a second of said at least two reagents, whereby said at least a portion of the specimen is driven to sequentially contact said at least two reagents, and then determining the results of the assay in the last of said at least two reagent positions.
Claim 3
Dependent Claim
20 words
The assay of claim 1 including at least one additional reagent positioned on said body to serve as a control.
Claim 4
Dependent Claim
31 words
The assay of claim 1, wherein said body is divided into a plurality of sections such that a separate assay may be accomplished by utilization of each of said separate sections.
Claim 5
Dependent Claim
15 words
The assay of claim 2, wherein said body is a cellulosic or glass fiber filter.
Claim 6
Dependent Claim
104 words
An immunoassay for diagnostic purposes comprising applying a specimen to a body having wicking characteristics, said body having thereon at least two binding partners that are different from each other and positioned on said body such that at least a portion of said specimen when applied to said body contacts sequentially one of said at least two binding partners and then contacts the other of said at least two binding partners, whereby the specimen is driven to sequentially contact said at least two binding partners, and then determining the results of the assay in the last of said at least two binding partner positions.
Claim 7
Dependent Claim
104 words
An immunoassay for diagnostic purposes comprising applying a specimen to a body having wicking characteristics, said body having thereon at least two binding partners that are different from each other and positioned on said body such that at least a portion of said specimen when applied to said body contacts sequentially one of said at least two binding partners and then contacts the other of said at least two binding partners, whereby the specimen is driven to sequentially contact said at least two binding partners, and then determining the results of the assay in the last of said at least two binding partner positions.
Claim 8
Dependent Claim
34 words
The immunoassay of claim 5, wherein at least one of said at least two binding partners is an antigen and wherein at least one of said at least two binding partners is an antibody.
Claim 9
Dependent Claim
15 words
The immunoassay of claim 6, wherein said antigen, or said antibody, or both are labeled.
Claim 10
Dependent Claim
15 words
The immunoassay of claim 7, wherein said label is an isotopic, fluorescent, or enzyme label.
Claim 11
Dependent Claim
15 words
The assay of claim 8, where said body is a cellulosic or glass fiber filter.
Claim 12
Dependent Claim
36 words
The immunoassay of any one of claims 5 to 9 wherein said body is divided into a plurality of sections such that a separate assay may be accomplished by utilization of each of said separate sections.
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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) | 1995-08-25 | 1996-02-24 | 1996-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-08-25 | 2000-02-24 | 2000-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-08-25 | 2004-02-24 | 2004-08-25 | $7700.00 | Window Closed / Lapsed |