US3751967A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sampling device
Assignee: Dow Chemical Co
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Filing: 1970-12-14
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Granted: 1973-08-14
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Expires: 1990-12-14
Abstract
Abstract A device and method for determining the presence of a contaminant in a gaseous atmosphere. The device comprises a flow regulatable source of a liquid, a spaced apart liquid receiver, and a surface means on which a liquid film is formed and guided from the liquid source to the receiver. A means to measure the presence of contaminant in the liquid is a part of the device. The device is especially useful for determining the presence of a chemically active pollutant in a gaseous phase.
Inventors
- 👤 R Fick
- 👤 A Markey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:26
CPC Classifications
G; G01; G01N; G01N1/00; G01N1/02; G01N1/22; G01N1/2247; G01N33/00; G01N33/0004; G01N33/0009; G01N33/0011
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
93 words
A sampling device comprising: a. a flow regulatable liquid source means; b. a liquid receiver spaced apart from said source means; c. a surface means on which to form a liquid film and guide a liquid flow from said source means to said liquid receiver; d. a substantially gas impervious shield adapted to minimize loss of the contaminated liquid from the device; e. a means for measuring the presence of a contaminant in the liquid; and f. a means to mount the device in a gas flow without substantially obstructing the gas flow.
Claim 2
Dependent Claim
93 words
A sampling device comprising: a. a flow regulatable liquid source means; b. a liquid receiver spaced apart from said source means; c. a surface means on which to form a liquid film and guide a liquid flow from said source means to said liquid receiver; d. a substantially gas impervious shield adapted to minimize loss of the contaminated liquid from the device; e. a means for measuring the presence of a contaminant in the liquid; and f. a means to mount the device in a gas flow without substantially obstructing the gas flow.
Claim 3
Dependent Claim
24 words
The device of claim 1 in which said source means is a pipe having a plurality of ports therein directed toward said surface means.
Claim 4
Dependent Claim
14 words
The device of claim 1 in which said surface means is a perforated strip.
Claim 5
Dependent Claim
14 words
The deviCe of claim 1 in which said measuring means is a pH meter.
Claim 6
Independent Claim
146 words
A method comprising: a. positioning a sampling device in an environment subject to a gas flow, the device comprising a flow regulatable liquid source means, a liquid receiver spaced apart from the source means, a surface means on which to form a liquid film and to guide a liquid flow from the source means to the liquid receiver, a means for measuring the presence of a contaminant in the liquid, and a means to mount the device in a gas flow without substantially obstructing the gas flow; b. passing a gas flow over the surface means; c. flowing a liquid on the exterior of the surface means simultaneously with step (b) whereby the liquid entraps contaminant contained in the gas; d. shielding the surface means to minimize loss of the liquid in the gas flow; and e. determining the presence of the contaminant in the liquid.
Claim 7
Independent Claim
146 words
A method comprising: a. positioning a sampling device in an environment subject to a gas flow, the device comprising a flow regulatable liquid source means, a liquid receiver spaced apart from the source means, a surface means on which to form a liquid film and to guide a liquid flow from the source means to the liquid receiver, a means for measuring the presence of a contaminant in the liquid, and a means to mount the device in a gas flow without substantially obstructing the gas flow; b. passing a gas flow over the surface means; c. flowing a liquid on the exterior of the surface means simultaneously with step (b) whereby the liquid entraps contaminant contained in the gas; d. shielding the surface means to minimize loss of the liquid in the gas flow; and e. determining the presence of the contaminant in the liquid.
Claim 8
Dependent Claim
23 words
The method of claim 5 including positioning the surface means in a plane angularly disposed to the major direction of the gas flow.
Claim 9
Dependent Claim
15 words
The method of claim 5 in which a contaminant solvent is collected by said receiver.
Claim 10
Dependent Claim
15 words
The method of claim 7 in which the pH of the contaminated solvent is measured.
Claim 11
Dependent Claim
12 words
The method of claim 5 including producing contaminated gas before step (b).
Claim 12
Dependent Claim
20 words
The method of claim 5 in which a 2,4-Dichlorophenoxy acetic acid contaminated gas flow is passed over said surface means.
Claim 13
Dependent Claim
87 words
A sampling device comprising: a. two flow regulatable liquid source means; b. a liquid receiver spaced apart from said source means; c. a perforated strip on which to form a liquid film and guide a liquid flow from said source means to said liquid receiver; d. a substantially gas impervious shield extending between said source means; e. a means for measuring the presence of a contaminant in the liquid; and f. a means to mount the device in a gas flow without substantially obstructing the gas flow.
Claim 14
Dependent Claim
87 words
A sampling device comprising: a. two flow regulatable liquid source means; b. a liquid receiver spaced apart from said source means; c. a perforated strip on which to form a liquid film and guide a liquid flow from said source means to said liquid receiver; d. a substantially gas impervious shield extending between said source means; e. a means for measuring the presence of a contaminant in the liquid; and f. a means to mount the device in a gas flow without substantially obstructing the gas flow.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |