Patent US3913393A successfully refreshed from Google Patents.
US3913393A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Emulsion layer of coloured indicators for determining spectra of the effects of a fluid on a surface
Assignee: OMNIUM TECH ADMINISTRAT
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Filing: 1972-03-06
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Granted: 1975-10-21
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Expires: 1992-03-06
Abstract
Abstract Emulsion layer of coloured indicators is applied to a surface for the purpose of determining iso-concentration curves of the effects of a flow of fluid on the relief of that surface; the layer is covered with a transparent membrane permeable to small molecules and impermeable to large molecules such as those of organic products or dyes. A layer of this kind may be applied to a model of a geographical site in order to determine the pollution conditions that sources of pollution, such as smokestacks, may inflict upon that site.
Inventors
- 👤 Leopold Facy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:58
CPC Classifications
G; G09; G09B; G09B25/00; B; B44; B44C; B44C3/00; B44C3/02; B44C3/025; G01; G01N; G01N31/00; G01N31/22; G01N31/221; G01P; G01P13/00; G01P13/0093; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
83 words
A mock-up comprising: a surface having contours produced, by mathematical similarity methods, from a given geometrical site; a gelatin layer spread over said surface and containing colored indicators sensitive to reagents contained in a fluid flowing over said contours; and a thin, transparent, semi-permeable membrane over said layer selectively permitting certain molecules or ions to pass through said layer and contact said colored indicators whereby an indelible spectrum of the effects produced by the flow of said fluid on said contours is obtained.
Claim 2
Dependent Claim
83 words
A mock-up comprising: a surface having contours produced, by mathematical similarity methods, from a given geometrical site; a gelatin layer spread over said surface and containing colored indicators sensitive to reagents contained in a fluid flowing over said contours; and a thin, transparent, semi-permeable membrane over said layer selectively permitting certain molecules or ions to pass through said layer and contact said colored indicators whereby an indelible spectrum of the effects produced by the flow of said fluid on said contours is obtained.
Claim 3
Dependent Claim
23 words
A mock-up as defined in claim 1, wherein said coloured indicators include granules, the size of which is that of 2/10 mm mesh.
Claim 4
Dependent Claim
17 words
A mock-up as defined in claim 1, wherein said layer has a uniform thickness over said surface.
Claim 5
Dependent Claim
17 words
A mock-up as defined in claim 1, wherein said membrane has a uniform thickness over said layer.
Claim 6
Dependent Claim
16 words
A mock-up as defined in claim 1, wherein said membrane includes a dispersion of cadmium ferrocyanide.
Claim 7
Dependent Claim
14 words
A mock-up as defined in claim 4, wherein said membrane is made of collodion.
Claim 8
Independent Claim
148 words
A method for making a mock-up having a surface produced, by mathematical similarity methods, from a given geometrical site in order to determine on said surface iso-concentration curves produced by the effects of a flow of fluid, containing reagents, comprising the steps of: maintaining the temperature of a gelatin base emulsion, containing colored indicators, between 40* and 45* Celsius; spraying a very small quantity of said emulsion onto said surface to obtain a thin layer thereon; repeating the spraying, at least once, of an additional gelatin layer over the applied first thin layer allowing the thin layer to dry between successive sprayings; and spraying said layer with a thin, transparent, semi-permeable membrane to selectively permit certain molecules or ions to pass through said layer and contact said colored indicators whereby an indelible spectrum of the effects produced by said flow of fluid on said surface may be obtained.
Claim 9
Independent Claim
148 words
A method for making a mock-up having a surface produced, by mathematical similarity methods, from a given geometrical site in order to determine on said surface iso-concentration curves produced by the effects of a flow of fluid, containing reagents, comprising the steps of: maintaining the temperature of a gelatin base emulsion, containing colored indicators, between 40* and 45* Celsius; spraying a very small quantity of said emulsion onto said surface to obtain a thin layer thereon; repeating the spraying, at least once, of an additional gelatin layer over the applied first thin layer allowing the thin layer to dry between successive sprayings; and spraying said layer with a thin, transparent, semi-permeable membrane to selectively permit certain molecules or ions to pass through said layer and contact said colored indicators whereby an indelible spectrum of the effects produced by said flow of fluid on said surface may be obtained.
Claim 10
Dependent Claim
30 words
A method as defined in claim 7 further comprising the steps of: incorporating potassium ferrocyanide in advance into the emulsion; projecting on to said layer a solution of cadmium chloride.
Claim 11
Dependent Claim
21 words
A method as defined in claim 7, further comprising spraying on said layer a solution of collodion, acetone and propyl alcohol.
Claim 12
Dependent Claim
21 words
A method as defined in claim 9, further comprising the step of spraying a solvent of said solution on saiD membrane.
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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) | 1978-10-20 | 1979-04-21 | 1979-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-20 | 1983-04-21 | 1983-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-20 | 1987-04-21 | 1987-10-21 | $7700.00 | Window Closed / Lapsed |