US4238529A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long wave-length x-ray diffraction crystal
Assignee: Philips North America LLC
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Filing: 1979-08-02
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Granted: 1980-12-09
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Expires: 1999-08-02
Abstract
Abstract An x-ray diffraction crystal for the analysis of x-rays comprisng at least two insoluble monolayers of (i) a first divalent metal soap, separated by (ii) at least one monolayer of either a fatty acid alone, or of a second divalent metal soap, the second metal having a lower atomic number than the first metal. Such crystals are formed by alternately raising and lowering a solid substrate through the monolayer-covered liquid surfaces of the first divalent metal cation soap monolayer, and the second divalent metal cation soap monolayer or fatty acid monolayer.
Inventors
- 👤 Albert Sicignano
- 👤 William P. Zingaro, deceased
- 👤 executrix Josephine Zingaro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:44
CPC Classifications
G; G21; G21K; G21K1/00; G21K1/06; G21K1/062; B; B82; B82Y; B82Y10/00; B82Y30/00; G21K2201/00; G21K2201/06; G21K2201/061; G21K2201/062; G21K2201/067
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
113 words
A method of manufacturing an x-ray diffraction crystal comprising the steps of: forming a monomolecular layer of a first divalent metal soap on the surface of a first aqueous solution; forming a monomolecular layer of either a fatty acid or a second divalent metal soap on the surface of a second aqueous solution, said second metal having a lower atomic number than said first metal; and alternately dipping a substrate in said first and second solutions, each dip transferring a monomolecular layer from the solution to the substrate, so as to form a diffraction crystal having the first metal soap layers separated by one or more fatty acid or second metal soap layers.
Claim 2
Independent Claim
113 words
A method of manufacturing an x-ray diffraction crystal comprising the steps of: forming a monomolecular layer of a first divalent metal soap on the surface of a first aqueous solution; forming a monomolecular layer of either a fatty acid or a second divalent metal soap on the surface of a second aqueous solution, said second metal having a lower atomic number than said first metal; and alternately dipping a substrate in said first and second solutions, each dip transferring a monomolecular layer from the solution to the substrate, so as to form a diffraction crystal having the first metal soap layers separated by one or more fatty acid or second metal soap layers.
Claim 3
Dependent Claim
93 words
A method of manufacturing an x-ray diffraction crystal, as claimed in claim 1, wherein each monomolecular layer forming step comprises: forming a water solution containing the appropriate metal ions or containing no metal ions; placing a solution of a fatty acid in n-hexane on the surface of the water solution; allowing the n-hexane to evaporate, thus forming either a fatty acid or a metal soap monomolecular layer on the surface of the water solution; and applying a floating barrier to the surface to cause the molecules of the monomolecular layer to come together.
Claim 4
Dependent Claim
40 words
A method of manufacturing an x-ray diffraction crystal, as claimed in claim 2, wherein the first divalent metal is lead and wherein the second divalent metal is one or more metals from the group consisting of beryllium, magnesium, and calcium.
Claim 5
Dependent Claim
20 words
A method of manufacturing an x-ray diffraction crystal, as claimed in claim 3, wherein the fatty acid is stearic acid.
References Cited (Backward Citations)
US3518427A
Cited
US3591803A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-12-09 | 1984-06-09 | 1984-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-09 | 1988-06-09 | 1988-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-09 | 1992-06-09 | 1992-12-09 | $7700.00 | Window Closed / Lapsed |