Patent US5736103A successfully refreshed from Google Patents.
US5736103A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Remote-dosing analyte concentration meter
Assignee: LifeScan Inc
•
Filing: 1996-08-09
•
Granted: 1998-04-07
•
Expires: 2016-08-09
Abstract
Abstract A meter is used in conjunction with a hollow, frustum-shaped disposable device to measure the concentration of an analyte in a sample of a biological fluid. The smaller end of the frustum has a porous membrane, to which a sample of the fluid may be applied. Preferably, a reagent in the membrane reacts with the analyte to cause a color change. The meter has a frustum-shaped distal section that mates with the device. The meter measures the color change and computes from the change the analyte concentration in the sample. The meter and disposable device permit remote dosing of the device, which minimizes the likelihood of cross-contamination between the user and the meter. Devices can be mounted on the meter and released from the meter without touching them, to further protect against contamination.
Inventors
- 👤 Jerry Thomas Pugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:55
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N21/00; G01N21/75; G01N21/77; G01N21/78; B; B01; B01L; B01L3/00; B01L3/50; B01L3/502; B01L3/5023; Y; Y10; Y10T; Y10T436/00; Y10T436/10; Y10T436/104998; Y10T436/106664; Y10T436/11; Y10T436/110833
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
167 words
A meter for measuring a concentration of an analyte in a sample of biological fluid that is applied to a first surface of a porous membrane that contains a reagent, which reacts with the analyte to cause a change in reflectance of a second surface of the membrane, the membrane being attached to and substantially closing an end of a hollow frustum device, and the meter comprising (a) a body having a frustum-shaped distal section for mating engagement with the device, the section tapering inwardly to an end that faces the second surface of the membrane, (b) an optical system in the body to direct a beam of light out from the distal end and to accept light reflected back from the second surface of the membrane, (c) means for measuring the light reflected back into the body both before and after the sample is applied to the membrane, and (d) means for computing the analyte concentration in the fluid from the measured values of reflected light.
Claim 2
Dependent Claim
167 words
A meter for measuring a concentration of an analyte in a sample of biological fluid that is applied to a first surface of a porous membrane that contains a reagent, which reacts with the analyte to cause a change in reflectance of a second surface of the membrane, the membrane being attached to and substantially closing an end of a hollow frustum device, and the meter comprising (a) a body having a frustum-shaped distal section for mating engagement with the device, the section tapering inwardly to an end that faces the second surface of the membrane, (b) an optical system in the body to direct a beam of light out from the distal end and to accept light reflected back from the second surface of the membrane, (c) means for measuring the light reflected back into the body both before and after the sample is applied to the membrane, and (d) means for computing the analyte concentration in the fluid from the measured values of reflected light.
Claim 3
Dependent Claim
15 words
The meter of claim 1 in which the frustum has a substantially rectangular cross section.
Claim 4
Dependent Claim
15 words
The meter of claim 1 in which the frustum has a substantially circular cross section.
Claim 5
Dependent Claim
22 words
The meter of claim 1 in which the distal section further comprises a peripheral groove for engaging corresponding portions of the device.
Claim 6
Dependent Claim
15 words
The meter of claim 1 further comprising a display for depicting the computed analyte concentration.
Claim 7
Dependent Claim
21 words
The meter of claim 1, further comprising a push-button means for disengaging the device from the distal end of the meter.
Claim 8
Dependent Claim
28 words
A kit for measuring analyte concentration in biological fluids comprising, in combination, the meter of claim 1 and an elongated container for holding a plurality of the devices.
Claim 9
Dependent Claim
21 words
The kit of claim 7 in which the devices are arranged in a nested array along the length of the container.
Claim 10
Dependent Claim
52 words
The kit of claim 8 in which the distal section of the meter comprises a peripheral groove for engaging corresponding portions of the devices, whereby a meter can be prepared for sample application by engagingly inserting the distal section of the meter into a device and removing the device from the container.
References Cited (Backward Citations)
US3991617A
Cited
US4717546A
Cited
US5279294A
Cited
US4637403A
Cited
US4787398A
Cited
US5053199A
Cited
US4952373A
Cited
US5100620A
Cited
US5594906A
Cited
US5536249A
Cited
US5569212A
Cited
US5553613A
Cited
US5628309A
Cited
US5605837A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-04-06 | 2001-10-06 | 2002-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-04-06 | 2005-10-06 | 2006-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-04-06 | 2009-10-06 | 2010-04-07 | $7700.00 | Window Closed / Lapsed |