US3837882A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Optical bodies with non-epitaxially grown crystals on surface
Assignee: Kewanee Oil Co
•
Filing: 1971-09-02
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Granted: 1974-09-24
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Expires: 1991-09-02
Abstract
Abstract This is a process for growing non-epitaxially a different crystal upon a base crystal surface and thereafter destroying said different crystal, thereby generating a uniformly random arrangement of surface irregularities which are independent of lattice orientation in the base crystal. The texture of the treated surface is unlike prior art surfaces, whether produced chemically or mechanically, and specular reflections are essentially eliminated.
Inventors
- 👤 C Swinehart
- 👤 J Lindow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:06
CPC Classifications
G; G01; G01T; G01T1/00; G01T1/16; G01T1/20; G01T1/202; C; C30; C30B; C30B29/00; C30B29/10; C30B29/12; C30B33/00; G01T1/161; G01T1/164; G01T1/1641; G01T1/2002; Y; Y10; Y10T; Y10T428/00; Y10T428/31
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
16 words
The process of claim 1, wherein said crystal nidus agent is suspended in an inert fluid.
Claim 2
Dependent Claim
23 words
The process of claim 1, including in addition mEchanically removing substantially all of said crystal nidus agent after said predetermined period of time.
Claim 3
Dependent Claim
37 words
The process of claim 3, including in addition disproportionating said non-epitaxial growth by removing substantially all of said moiety from the surface of said base crystal so as to render the surface essentially free of specular reflections.
Claim 4
Dependent Claim
74 words
A scintillator crystal with at least one preselected surface controlledly disfigured to a preselected grain density in a uniformly random manner, irrespective of the particular submicroscopic orientation of particular portions of said scintillator crystal, as a result of the destruction of a non-epitaxial growth of crystalline material generated by a finely divided crystal nidus agent in association with a transferable, non-epitaxial growth forming moiety, said surface being characterized by a freedom of specular reflections.
Claim 5
Dependent Claim
13 words
The article of claim 5 wherein said crystal is an inorganic scintillation phosphor.
Claim 6
Dependent Claim
27 words
The article of claim 6 wherein said inorganic scintillation phosphor is thallium-activated sodium iodide, europium-activated lithium iodide, thallium-activated cesium iodide, sodium-activated cesium iodide, or thallium-activated potassium iodide.
Claim 7
Dependent Claim
15 words
The article of claim 6 wherein said inorganic scintillation phosphor is a hygroscopic ionic crystal.
Claim 8
Dependent Claim
18 words
The article of claim 8, wherein said finely divided crystal nidus agent has water of crystallization associated therewith.
Claim 9
Dependent Claim
29 words
The article of claim 9 wherein said crystal nidus agent is calcium sulfate, magnesium sulfate, barium iodide, sodium iodide, sodium bromide, alkali metal silicates or alkaline earth metal silicates.
Claim 10
Dependent Claim
15 words
The article of claim 6 wherein said inorganic scintillation phosphor does not unite with water.
Claim 11
Dependent Claim
25 words
The article of claim 11 wherein said finely divided crystal nidus agent is potassium fluoborate and the transferable moiety is boron fluoride or complexes thereof.
Claim 12
Dependent Claim
70 words
A crystalline optical body having at least one preselected surface controlledly disfigured to a preselected grain density in a uniformly random manner, irrespective of the particular submicroscopic orientation of particular portions of said optical body, as a result of non-epitaxial growth of crystalline material generated by a finely divided crystal nidus agent in association with a transferable, non-epitaxial growth-forming moiety, said surface being characterized by a freedom of specular reflections.
Claim 13
Dependent Claim
15 words
The crystalline body of claim 13 wherein said non-epitaxial growth of crystalline material is destroyed.
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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) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |