US3871228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Permeable membrane gas saturometer
Assignee: United States Department of the Navy
•
Filing: 1973-05-14
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Granted: 1975-03-18
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Expires: 1993-05-14
Abstract
Abstract The saturometer measures the total dissolved gas pressure present in solutions such as in rivers, lakes, and other water bodies. A di-methyl silicone rubber tubing, permeable to gases and water vapor, is immersed in the water and a precision pressure gauge coupled to the tubing measures the internal pressures produced by gas components diffusing into the bore through the membrane wall.
Inventors
- 👤 Ray Franklin Weiss
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:55
CPC Classifications
G; G01; G01N; G01N7/00; G01N7/10
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
65 words
Apparatus for measuring in situ the total pressure of gas components present in a large body of water comprising: a thin-walled gas-permeable membrane sensor formed as an elongate flexible tube having a relatively small internal volumetric area and a relatively large external surface area, a pressure gauge, conduit means coupling said internal area to said gauge for conducting internal area gas pressures to the gauge,
Claim 2
Dependent Claim
65 words
Apparatus for measuring in situ the total pressure of gas components present in a large body of water comprising: a thin-walled gas-permeable membrane sensor formed as an elongate flexible tube having a relatively small internal volumetric area and a relatively large external surface area, a pressure gauge, conduit means coupling said internal area to said gauge for conducting internal area gas pressures to the gauge,
Claim 3
Dependent Claim
15 words
The apparatus of claim 1 wherein said sensor is formed of a di-methyl silicone tubing.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein said pressure gauge is a manometer in which said internal pressures act against barometric pressures.
Claim 5
Dependent Claim
33 words
The apparatus of claim 1 wherein the characteristics response time required for said internal pressure to reach equilibrium is proportional to the following ratio: internal volume of membrane X membrane thickness membrane area
Claim 6
Dependent Claim
34 words
The apparatus of claim 1 wherein said frame includes plural pairs of said spaced legs and said sensor is in the form of a separate elongate tube wound on each pair of the legs.
Claim 7
Dependent Claim
37 words
The apparatus of claim 5 wherein said elongate tubes each are not appreciably less than fifty foot in length and each has an outer diameter of about 0.025 inches and an inner diameter of about 0.012 inches.
References Cited (Backward Citations)
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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) | 1978-03-17 | 1978-09-16 | 1979-03-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-17 | 1982-09-16 | 1983-03-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-17 | 1986-09-16 | 1987-03-18 | $7700.00 | Window Closed / Lapsed |