US5290705A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Speciman support for optical analysis
Assignee: RE DAVIS CHEMICAL Corp A CORP OF IL
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Filing: 1992-01-13
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Granted: 1994-03-01
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Expires: 2012-01-13
Abstract
Abstract A specimen support for optical observation or analysis. The support comprises a disc-like member composed of a rigid material and having at least one unobstructed hole extending therethrough. When analyzing a liquid specimen, the disc is dipped in the liquid and the surface tension of the liquid will cause the liquid to bridge or span the hole. The support is then placed in a tray or holder and exposed to an infrared beam to generate an infrared spectrum.
Inventors
- 👤 Robert E. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 18:10
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5085; B01L3/5088; G; G01; G01N; G01N21/00; G01N21/01; G01N21/03; B01L2300/00; B01L2300/08; B01L2300/0809; B01L2300/0822; G01N2021/0346; G01N21/17; G01N21/25; G01N21/31; G01N21/35; G01N21/3577
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
122 words
A method of analyzing a liquid specimen, comprising the steps of forming a specimen support of a rigid material that is non-reactive to water and acidic substances and having a pair of opposed surfaces and having a plurality of unobstructed holes extending between said surfaces, a first of said holes having a different cross sectional area than a second of said holes, positioning said support so that said surfaces are horizontal and the axes of the holes are vertical, enclosing each hole with an unsupported film of a liquid specimen to be analyzed, directed a beam of infrared light through the hole and through the liquid film enclosing the hole, and generating a wavelength spectrum of said beam passing through said film.
Claim 2
Independent Claim
122 words
A method of analyzing a liquid specimen, comprising the steps of forming a specimen support of a rigid material that is non-reactive to water and acidic substances and having a pair of opposed surfaces and having a plurality of unobstructed holes extending between said surfaces, a first of said holes having a different cross sectional area than a second of said holes, positioning said support so that said surfaces are horizontal and the axes of the holes are vertical, enclosing each hole with an unsupported film of a liquid specimen to be analyzed, directed a beam of infrared light through the hole and through the liquid film enclosing the hole, and generating a wavelength spectrum of said beam passing through said film.
Claim 3
Dependent Claim
23 words
The method of claim 1, wherein the step of enclosing the holes comprises dipping the support in a quantity of said liquid specimen.
Claim 4
Dependent Claim
52 words
The method of claim 1, and including the step of forming the film of each liquid specimen with a thickness sufficient to provide a spectrum when said beam is passed through said film, said film having a pair of generally parallel surfaces substantially free of convexity that extend transversely across said holes.
Claim 5
Dependent Claim
26 words
The method of claim 1, and including the step of maintaining the thickness of said film at a value less than that necessary to cause lensing.
Claim 6
Dependent Claim
141 words
An analytic specimen support for infrared microspectroscopy, comprising a holder having a confined opening extending therethrough, support means provided in the opening, and a specimen support removably disposed in the opening and mounted on said support means, said specimen support composed of a rigid material that is non-reactive to water, acidic substances and solvents, said specimen support including a pair of opposed generally flat horizontal surfaces and having a plurality of unobstructed holes extending between said surfaces with the axes of the holes being vertical, a film of a liquid specimen spanning each hole and held in said hole by the surface tension of the liquid, the film spanning each of said holes having generally parallel opposed surfaces and being free of convexity, a first of said holes having a different cross sectional area than a second of said holes. 15
Claim 7
Dependent Claim
141 words
An analytic specimen support for infrared microspectroscopy, comprising a holder having a confined opening extending therethrough, support means provided in the opening, and a specimen support removably disposed in the opening and mounted on said support means, said specimen support composed of a rigid material that is non-reactive to water, acidic substances and solvents, said specimen support including a pair of opposed generally flat horizontal surfaces and having a plurality of unobstructed holes extending between said surfaces with the axes of the holes being vertical, a film of a liquid specimen spanning each hole and held in said hole by the surface tension of the liquid, the film spanning each of said holes having generally parallel opposed surfaces and being free of convexity, a first of said holes having a different cross sectional area than a second of said holes. 15
Claim 8
Dependent Claim
20 words
The support of claim 5, wherein said holes have a diameter in the range of 10 microns to 13 millimeters.
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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) | 1997-02-28 | 1997-08-30 | 1998-03-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-02-28 | 2001-08-30 | 2002-03-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-02-28 | 2005-08-30 | 2006-03-01 | $7700.00 | Window Closed / Lapsed |