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US5589350A
Expired / Lapsed
US
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Testing device for liquid and liquid suspended samples
Assignee: Biolog Inc
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Filing: 1996-01-11
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Granted: 1996-12-31
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Expires: 2016-01-11
Abstract
Abstract Testing of samples in a small, closed, and easy-to-fill device. Simultaneous filling of a large number of test wells using a novel gas-venting design, allowing for multiparameter testing and/or identification of bacteria.
Inventors
- 👤 Barry Bochner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 16:31
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5025; B01L2200/00; B01L2200/06; B01L2200/0642; G; G01; G01N; G01N35/00; G01N35/00029; G01N2035/00099; G01N2035/00148
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
180 words
A method for testing samples comprising: (a) providing a sample in liquid form; (b) providing a sample delivering means; (c) providing a device comprising: i) a housing, ii) a testing region comprising a plurality of test wells contained within said housing, iii) a liquid receiving means at an external surface of said housing, iv) a liquid flow-directing means providing liquid communication between said test wells of said testing region and said liquid receiving means, and v) a single gas-venting, liquid barrier having an inner and outer surface wherein said inner surface is in fluidic communication with said test wells of said testing region; (d) delivering, internal to said housing, said sample via said sample delivering means to said testing region, such that said liquid enters said device at said liquid receiving means under positive pressure and the air in said device is vented through said gas-venting liquid barrier, wherein said positive pressure is greater than 1 pound per square inch; and (e) attaching a non-venting material to said outer surface of said gas-venting barrier, such that said device is sealed.
Claim 2
Independent Claim
180 words
A method for testing samples comprising: (a) providing a sample in liquid form; (b) providing a sample delivering means; (c) providing a device comprising: i) a housing, ii) a testing region comprising a plurality of test wells contained within said housing, iii) a liquid receiving means at an external surface of said housing, iv) a liquid flow-directing means providing liquid communication between said test wells of said testing region and said liquid receiving means, and v) a single gas-venting, liquid barrier having an inner and outer surface wherein said inner surface is in fluidic communication with said test wells of said testing region; (d) delivering, internal to said housing, said sample via said sample delivering means to said testing region, such that said liquid enters said device at said liquid receiving means under positive pressure and the air in said device is vented through said gas-venting liquid barrier, wherein said positive pressure is greater than 1 pound per square inch; and (e) attaching a non-venting material to said outer surface of said gas-venting barrier, such that said device is sealed.
Claim 3
Dependent Claim
19 words
The method of claim 1 further comprising, prior to step (d), prefilling said test wells with a test formula.
Claim 4
Dependent Claim
20 words
The method of claim 2 wherein said test formula comprises basal medium, one or more carbon sources, and an indicator.
Claim 5
Dependent Claim
12 words
The method of claim 3 wherein said indicator is a redox indicator.
Claim 6
Dependent Claim
10 words
The method of claim 4 wherein said sample is microbiological.
Claim 7
Dependent Claim
22 words
The method of claim 1 wherein said liquid receiving means comprises a liquid entry port at an external surface of said housing.
Claim 8
Dependent Claim
20 words
The method of claim 6 wherein said sample delivering means comprises a pipette adapted to fit said liquid entry port.
Claim 9
Dependent Claim
25 words
The method of claim 7 wherein said port has internal grooves and said pipette has corresponding threads so that a substantially liquid-tight seal is formed.
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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) | 1999-12-31 | 2000-07-01 | 2000-12-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-12-31 | 2004-07-01 | 2004-12-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-12-31 | 2008-07-01 | 2008-12-31 | $7700.00 | Window Closed / Lapsed |