US3884072A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow measuring apparatus having a colorimetric urine indicator
Assignee: Kendall Co
•
Filing: 1973-05-14
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Granted: 1975-05-20
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Expires: 1993-05-14
Abstract
Abstract An indicator for the colorimetric detection of urine in combination with an apparatus for measuring the approximate peak flow rate of a liquid discharge is disclosed. The indicator comprises an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to one or more of the ions present in urine.
Inventors
- 👤 Shu-Sing Cheng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 17:59
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/521; A; A61; A61B; A61B5/00; A61B5/20; A61B5/207; A61B5/208; G01F; G01F1/00; G01F1/05; G01F1/52; G01N31/00; G01N31/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
99 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising: a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity through the opening means, said device including an indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to the chloride ions present in urine.
Claim 2
Independent Claim
99 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising: a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity through the opening means, said device including an indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to the chloride ions present in urine.
Claim 3
Dependent Claim
28 words
The device of claim 1 wherein said absorbent carrier is a strip of paper or cardboard calibrated to allow reading of maximum height of urine in said apparatus.
Claim 4
Dependent Claim
36 words
The device of claim 1 wherein said indicating chemical is a silver salt selected from the group consisting of silver chromate, silver dichromate, silver phosphate, silver carbonate, silver oxide, silver perborate, silver periodate and silver fluoride.
Claim 5
Independent Claim
98 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising; a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity through the opening means, said device including an indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to the potassium ions in urine.
Claim 6
Independent Claim
98 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising; a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity through the opening means, said device including an indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to the potassium ions in urine.
Claim 7
Dependent Claim
12 words
The device of claim 4 wherein said indicating chemical is sodium cobaltinitrite.
Claim 8
Independent Claim
111 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising: a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity, through the opening means, said device including an indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to one or more of the ions present in urine, and said indicating chemical is resistant to ethylene oxide.
Claim 9
Independent Claim
111 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising: a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity, through the opening means, said device including an indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to one or more of the ions present in urine, and said indicating chemical is resistant to ethylene oxide.
Claim 10
Dependent Claim
12 words
The device of claim 6 wherein said indicating chemical is silver chromate.
Claim 11
Independent Claim
111 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising: a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity through the opening means, said device including a sterile indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to one or more of the ions present in urine, said indicating chemical being resistant to ethylene oxide.
Claim 12
Independent Claim
111 words
A device for measuring the approximate peak flow rate of a urine discharge, comprising: a receptacle having a cavity and an inlet port adjacent an upper end of the receptacle for passage of the urine discharge into the cavity, and a weir having opening means for passage of urine from the cavity through the opening means, said device including a sterile indicating strip for measuring the approximate maximum height of urine collected in said cavity, said strip comprising an absorbent carrier bearing an indicating chemical which undergoes an irreversible color change upon exposure to one or more of the ions present in urine, said indicating chemical being resistant to ethylene oxide.
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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) | 1978-05-19 | 1978-11-18 | 1979-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-19 | 1982-11-18 | 1983-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-19 | 1986-11-18 | 1987-05-20 | $7700.00 | Window Closed / Lapsed |